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Conditions and symptoms

Clear, sourced guides to what you’re feeling, written in plain language.

Common right now

The questions people ask us most.

UTIBurning, urgency, and what actually treats it Strep throatWhen a sore throat needs a test Cold and fluWhat helps, what doesn’t, and what to watch CoughThe patterns that matter, and when to get seen HeadacheTension, migraine, or the rare dangerous kind Stomach painWhere it hurts changes what it means Vomiting and diarrheaFluids first, and the dehydration line Pink eyeViral or bacterial, and what schools require RashWhat its shape and spread can tell you Can’t sleepWhat fixes insomnia, and what backfires AnxietyWhen worry becomes something treatable Panic attackWhat it is, and how to get through one

Some symptoms can’t wait

If any of these are happening now, read the warning signs first. When in doubt, call 911.

Chest painWhen to call 911, and when it can wait Trouble breathingNever a wait-and-see symptom Fever with a stiff neckRare, and the one you can’t miss Head injuryWhat to watch in the first 48 hours Severe belly painThe pattern that means the ER now FaintingUsually harmless, sometimes the heart

College health

The logistics that get in the way of care, answered plainly.

Campus health center closed?What it covers, and what to do after hours Keeping a visit private from parentsHow insurance letters work, and how to keep care private No insurance, or worried about cost?What care costs, and the options that cost less

Browse all conditions

768 guides, A to Z.

A B C D E F G H I J K L M N O P Q R S T U V W X Y Z

DVT: the leg clot you must not massage or ignore Dandruff: Why the Flakes Keep Coming Back, and How Medicated Shampoo Actually Works De Quervain's tenosynovitis: the new-parent wrist (and the phone-scroll wrist) Degenerative disc disease: the scary name for a normal, manageable back Dehydration: signs, the oral rehydration recipe, and when it is urgent Dehydration: the signs, the fixes, and when it is serious Delayed Puberty: When Everyone Else Is Growing and Your Child Is Not Delayed sleep phase disorder: the body clock that runs three hours late Dengue fever: the breakbone virus, the danger window when the fever breaks, and the acetaminophen rule Depersonalization and derealization: feeling unreal, and why it passes Depression: symptoms, treatment, and when to get help Dermatographia: symptoms, treatment, and when to worry Dermatomyositis: the muscle weakness with the telltale rash Deviated septum: why one nostril never works properly Diabetic gastroparesis: the stomach that empties too slowly, and the small-meals plan that works around it Diabetic retinopathy: protecting your sight from diabetes Diaper rash: symptoms, treatment, and when to worry Diarrhea: causes, treatment, and when to see a doctor Difficulty swallowing: the symptom you should never sit on Diffuse large B-cell lymphoma: the fast lymphoma that chemo can cure, and the six cycles of R-CHOP Discoid lupus: the coin-shaped patches that scar, and why sun and smoking are the real battle Diverticulitis: when colon pouches get inflamed Dizziness: causes, red flags, and when to see a doctor Drug allergy: the rash, the rules, and the penicillin label worth checking Dry drowning and secondary drowning: the facts for parents Dry eyes: why they water, what actually helps, and when to get checked Dry mouth: when the saliva stops doing its quiet, essential job Dry socket: the extraction pain that starts on day three Dumping syndrome: the stomach that empties too fast, and the small-meals science that tames it Dupuytren's contracture: the hand's cords slowly pulling the fingers in Dust mite allergy: symptoms, treatment, and when to worry Dyscalculia: When Numbers Will Not Stick, and Reading and Everything Else Is Fine Dyshidrotic eczema: the intensely itchy blisters on hands and feet Dyslexia: A Bright Child Who Cannot Crack Reading, and What Actually Helps Dyspareunia: the painful sex that has a cause and a treatment Dystonia: When Muscles Pull Without Permission, and the Treatments That Quiet Them

E. coli Infection: From Undercooked Food to Bloody Diarrhea, and the One Complication to Know Ear infection in adults: symptoms, treatment, and when to worry Ear infections in children: antibiotics or not, pain relief, and glue ear Ectopic pregnancy: the early-pregnancy pain that must be checked today Eczema: triggers, treatment, and when to see a doctor Emphysema: the breathlessness that crept, and why quitting at any age is still the treatment Encephalitis: When a Flu-Like Illness Reaches the Brain, Hours Matter End-stage renal disease: the dialysis-and-transplant crossroads Endocarditis: The Heart Valve Infection Behind the Fever That Will Not Quit Endometriosis: the period pain that is not normal Enlarged Prostate (BPH): The Aging Gland, the Night Trips, and the Menu of Fixes Enlarged prostate (BPH): the slow squeeze on a middle-aged bladder Enlarged prostate (BPH): the urinary slowdown of middle age Eosinophilic esophagitis: the food pipe that fights the food, and the diet and steroid plan Epididymitis: the swollen tender testicle, and sorting infection from the emergency that mimics it Epiglottitis: the sore throat that is an airway emergency, and what the fast response looks like Epilepsy: the seizure condition that treatment controls Epiretinal Membrane: The Wrinkle on the Retina That Bends Straight Lines Erectile dysfunction: physical vs psychological, what works, and the heart link Erythema nodosum: the tender shin lumps that are usually a signpost, and what they point to Esophageal cancer: the swallow that starts sticking, and the long heartburn that deserves respect Esophageal stricture: when food starts sticking on the way down Esophagitis: the inflamed gullet behind heartburn and swallowing pain Essential thrombocythemia (ET): the blood with too many platelets Essential tremor: the shaking hands that are not Parkinson’s Eustachian tube dysfunction: the blocked ear that clicks and will not pop Ewing sarcoma: the bone cancer of children and teenagers, and the chemo-surgery combination that cures most Exercise-induced asthma: symptoms, treatment, and when to worry Eye floaters: the drifting specks, and the shower that means go now Eye strain: the screen-tired eyes that rest and habits fix

Factor V Leiden: symptoms, treatment, and when to worry Fainting (syncope): the brief blackout and the question of why Fatty liver disease (NAFLD): the silent liver condition of the modern metabolism Fatty liver disease: the silent condition on your blood test Febrile seizures: terrifying to watch, benign almost every time Fecal impaction: the stuck stool mass behind overflow diarrhea and pain Female Infertility: When to Stop Waiting, What Gets Tested, and What Comes Next Femoral hernia: the groin lump that strangulates more than others, and the prompt repair Fever in adults: when to worry, what helps, and when to see a doctor Fever in children: what the number means, when to worry, and what to do Fibroadenoma: the smooth, mobile breast lump that is benign Fibroids: the common growths behind heavy periods Fibromuscular dysplasia: the artery condition behind young high blood pressure Fibromyalgia: widespread pain with normal tests, and what actually helps Fifth disease: the slapped-cheek rash that worries parents for no reason Flat feet: when fallen arches matter and when they are just feet Flat head syndrome: symptoms, treatment, and when to worry Flu vs COVID: how to tell them apart and what to do Folate deficiency: the tiredness that a blood test explains Follicular lymphoma: the slow lymphoma that can be watched, and when watching turns to treating Folliculitis: the itchy bumps around hair follicles Food poisoning: how long it lasts, what helps, and when to worry Frontotemporal dementia: the dementia that changes personality first, and the diagnosis behind the behavior Frostbite: when cold starts freezing the tissue itself Frozen shoulder: the three stages and the long road through them Fructose intolerance: the bloating and diarrhea after fruit and sweet drinks Functional neurological disorder: symptoms, treatment, and when to worry

Galactorrhea: milk production when you are not breastfeeding Gallstones: the pain after a fatty meal, and what to do about it Ganglion cyst: the wrist balloon that is full of jelly, not trouble Gastritis: the burning stomach lining, and what calms it Gastroparesis: the stomach that forgot to empty Generalized Anxiety Disorder: The Worry That Won't Clock Out, and the Treatments That Retrain It Genital herpes: the first outbreak, the recurrences, and the honest facts Geographic tongue: the wandering map that looks alarming and is not Germ cell tumors: the lump young men sit on, and the most curable cancer there is Gestational diabetes: what the diagnosis means for you and the baby Giant cell arteritis: symptoms, treatment, and when to worry Giardia: the water-borne parasite behind the weeks of diarrhea and bloating Gilbert syndrome: the harmless bilirubin quirk that needs no treatment Gingivitis: the bleeding gums that are asking, politely, for floss Glaucoma: the silent pressure that steals sight from the edges Globus sensation: the lump-in-throat feeling that is usually benign Glomerulonephritis: the kidney filters on fire, and why the urine test tells the whole story Goiter: symptoms, treatment, and when to worry Golfer's elbow: the inner-elbow cousin of tennis elbow Gonorrhea: the common STI with the simple cure, and the partner conversation that finishes the job Goodpasture syndrome: the autoimmune attack on kidneys and lungs Gout: what a flare feels like, treatment, and the diet truth Graft-versus-host disease: the transplant fighting back, and why a little of it is the point Granulomatosis with polyangiitis: the vasculitis behind the sinus trouble that would not clear, and the road to remission Graves' disease: the autoimmune switch that leaves the thyroid floored Grief and loss: the love with nowhere to go, and how it actually moves Groin strain: the inner-thigh pull that sprinting and side-stepping punish Growing pains: the evening leg aches that worry parents Guillain-Barre syndrome: symptoms, treatment, and when to worry Gynecomastia: enlarged breast tissue in men, explained

H. pylori: the stomach bacterium behind most ulcers, and how to evict it HPV: the virus almost everyone gets, and how screening tames it Hair loss: which pattern is yours, what regrows, and what treatment works Hammer toe: the bent toe that shoes, pads, and sometimes surgery fix Hammertoe: the toe that slowly curls and will not lie flat Hamstring strain: the sprint-stopping pull at the back of the thigh Hand, foot and mouth disease: what parents need to know Hangovers: what actually helps and when it is dangerous Hashimoto's disease: the slow thyroid behind years of tiredness Head lice: finding them, the wet-comb and lotion routines, and the myths Headache: types, red flags, and when to see a doctor Health anxiety: when the fear of illness becomes the illness Heart block: the wiring fault behind the dizzy spells, and the pacemaker that fixes it for good Heart failure: the weakened pump, and the daily weigh-in that manages it Heart murmur: the extra whoosh that usually means nothing Heart palpitations: causes, when they are harmless, and red flags Heart valve disease: the murmur with a schedule, and the moment that repair beats watchful waiting Heartburn in pregnancy: what helps and what is safe Heartburn or heart attack: how to tell the difference Heat exhaustion: symptoms, the 30-minute rule, and heatstroke warning signs Heat rash: the itchy prickles of summer, and how to cool them down Heat stroke: the summer emergency where minutes matter Heavy periods: how heavy is too heavy, and what lightens them Heel spurs: the bony point that is rarely the real problem Hemiplegic migraine: the migraine that mimics a stroke, and the plan that tames it Hemochromatosis: the iron-overload condition that regular blood donation treats Hemophilia: symptoms, treatment, and when to worry Hemorrhoids: what works, what to avoid, and when bleeding is not hemorrhoids Henoch-Schönlein purpura: the childhood rash with the sore joints, and the urine checks that matter most Hepatic encephalopathy: when liver failure clouds the brain Hepatitis B: the silent liver virus with a vaccine and a plan Hepatitis C: the quiet liver infection that is now curable Hepatoblastoma: the childhood liver cancer with the good odds, and the months that ask everything Herniated disc: the slipped disc that mostly heals itself Hiatus hernia: the stomach in the chest, and the reflux it causes Hidradenitis suppurativa: the recurring boils that are not your fault High Blood Pressure: The Silent Reading, the Home Monitor, and the Numbers That Matter High blood pressure: what the numbers mean and how to bring them down High cholesterol: which numbers matter and what actually moves them Hip impingement (FAI): the groin pain of the young and active hip Hip pain: what the location tells you, what helps, and red flags Hirsutism: the hair growth that follows a male pattern, and the hormone question underneath Hives: causes, the 24-hour rule, antihistamines, and the anaphylaxis signs Hoarding disorder: symptoms, treatment, and when to worry Hodgkin lymphoma: one of the most curable cancers Horner syndrome: the droopy lid and small pupil, and the detective work that follows Huntington's disease: the inherited brain condition, the testing question, and the years it does not own Hydrocele: the painless fluid swelling in the scrotum, explained Hydrocephalus: the fluid pressure on the brain, the shunt that drains it, and the NPH that hides as dementia Hyperacusis: symptoms, treatment, and when to worry Hyperemesis gravidarum: when morning sickness becomes dangerous Hyperparathyroidism: symptoms, treatment, and when to worry Hypersomnia: when sleeping enough never feels like enough Hyperthyroidism: the racing engine behind the weight loss and tremor Hypoglycemia: Low Blood Sugar, the Shakiness Explained, and When It Matters Hypoparathyroidism: when the calcium-control glands go quiet Hypoplastic left heart syndrome: the half-formed heart, the staged surgeries, and the children who grow Hypothermia: when the cold reaches the core Hypothyroidism: symptoms, the TSH test, and taking levothyroxine right

IBS: The Sensitive Gut, the Normal Scopes, and the Map to Fewer Bad Days IBS: symptoms, the pattern that confirms it, and what actually helps IT band syndrome: the outer-knee pain at the same point every run Idiopathic pulmonary fibrosis: the lung-scarring disease with treatments that slow it Immune Thrombocytopenia (ITP): Low Platelets, Bleeding Risk, and Living With It Impetigo: the crusty facial rash that spreads fast Inclusion body myositis: the slow muscle weakness that resists treatment, and the function worth defending Ingrown toenail: home care that works, when you need a podiatrist, and prevention Inguinal Hernia: The Groin Bulge That Comes and Goes, and the Decision About Repair Insect bites and stings: what is normal and when to get care Insomnia: The Awake Hours, the Pills Question, and the Therapy That Outperforms Them Insulinoma: the rare pancreatic tumor that drops blood sugar Interstitial cystitis: the bladder that always feels full and sore Interstitial lung disease: the breathlessness and the crackles, decoded Intussusception: the bowel that telescopes, the waves of pain, and the air enema that fixes most Irregular periods: what your cycle is telling you Ischemic colitis: symptoms, treatment, and when to worry

Jammed finger: ball sports injuries and when to buddy-tape Jellyfish stings: symptoms, treatment, and when to worry Jet lag: how to shift your body clock faster Jock itch: the groin rash that is athlete's foot's roommate

Kawasaki disease: the long fever in a small child, and the heart arteries the treatment protects Keloids: The Scars That Outgrow the Wound, and the Treatments That Flatten Them Keratoconus: The Cornea That Cones, and How to Stop It Getting Worse Keratosis pilaris: the chicken skin on your upper arms Kidney cancer: the scan finding nobody expected, the small-mass options, and the surgery that cures most Kidney cysts: symptoms, treatment, and when to worry Kidney infection: when a UTI climbs upward Kidney stones: symptoms, passing them, and prevention Klinefelter Syndrome: The Extra X, What It Changes, and What It Does Not Knee pain: causes by location, home care, and when to get it checked Knock knees in kids: symptoms, treatment, and when to worry Kyphosis: The Rounding Upper Back, the Growth-Window Decisions, and What Exercise Can and Cannot Do

Labyrinthitis: the inner-ear inflammation behind the sudden vertigo Lactose intolerance: the milk-sugar problem that is manageable, not dangerous Lambert-Eaton Syndrome: Weakness That Eases With Use, and What It Points To Laryngeal cancer: the hoarse voice that does not clear Laryngitis: why you lost your voice and how to get it back Lead poisoning: symptoms, treatment, and when to worry Leiomyosarcoma: the rare smooth-muscle cancer, the surgery at its center, and the surveillance after Leptospirosis: the water-borne infection that mimics flu, and the severe turn called Weil's disease Lewy Body Dementia: Hallucinations, Fluctuations, and the Medicine Warning Every Family Needs Lichen planus: the itchy purple bumps and mouth stripes, the slow fade, and the flare management Lichen sclerosus: the itchy, whitening genital skin that steroid cream controls Lipedema: the heavy legs that diet never touched, the name that explains them, and the treatments that help Lipoma: the soft lump under the skin that is almost always harmless Listeria infection: the food-borne bacteria most people shrug off, and the pregnancy warning that matters Liver cancer: the cirrhosis connection, the surveillance that catches it early, and the treatments by stage Long COVID: when the infection ends but the illness does not Long QT Syndrome: The Heart's Electrical Delay and How Families Stay Safe Loss of smell: symptoms, treatment, and when to worry Low blood pressure: the dizziness on standing, and when it matters Low platelets (thrombocytopenia): the bruising-and-bleeding blood count, decoded Low testosterone: real symptoms vs noise, the two-test rule, and treatment Lower back pain: when to worry, causes, and treatment Lung cancer: the cough that stayed, the staging that steers, and the treatments that changed everything Lupus: the great imitator that takes years to name Lymphangioleiomyomatosis (LAM): Cysts in the Lungs, and the Medicine That Slows Them Lymphedema: the swelling that needs managing, not just elevating

ME/CFS: The Crash After Effort, the Diagnosis Without a Test, and the Pace That Protects MGUS: A Protein Flag on Routine Bloodwork, and What Monitoring Actually Means MRSA: what the resistant staph means for you Macular degeneration: losing the center of the picture, keeping the edges Magnet ingestion in children: the emergency rules Malabsorption: when food passes through without nourishing you Malaria: the fever after the trip, the parasite in the blood, and the rule that every fever counts Male Infertility: Half the Story, and the Half Nobody Checks First Mallory-Weiss tear: symptoms, treatment, and when to worry Marfan syndrome: the connective-tissue condition that watches the aorta Mast cell activation syndrome: the allergic reactions without the allergy, the years of not being believed, and the plan Mastitis: the painful breast infection you should not feed through alone Measles: More Than a Rash, and the Vaccine That Ends It Measles: far more than a rash, and one of the most contagious diseases we know Medullary Thyroid Cancer: A Different Thyroid Cancer, a Blood Test That Tracks It, and a Gene to Check Melasma: the mask of pregnancy and how to fade it Meniere's disease: the vertigo attacks with roaring ears and fading hearing Meningioma: the common brain tumor that usually is not an emergency, and the watch or treat decision Meningitis: the symptoms that mean call 911 now Meniscus tear: the knee cartilage that catches, locks, and aches Menopause hot flashes: why they happen, what treats them, and HRT honestly Mesothelioma: the asbestos cancer decades later, the team that treats it, and the practical help that exists Metabolic syndrome: the waist-and-numbers cluster that doubles your risk Metatarsalgia: The Pebble-in-the-Shoe Forefoot, and the Off-Loading That Fixes It Microscopic colitis: the watery diarrhea that only the microscope sees Migraine: triggers, treatment, and when a headache is more Milia in newborns: symptoms, treatment, and when to worry Miscarriage: What Is Happening, What Comes Next, and Why It Was Not You Misophonia: When Ordinary Sounds Trigger Rage, and What Helps Mitral valve prolapse: the clicky valve that is usually just watched Molar Pregnancy: When a Pregnancy Is Not a Baby, and the Follow-Up That Protects You Mold allergy: symptoms, treatment, and when to worry Molluscum contagiosum: the pearly bumps that take their time Mono (glandular fever): symptoms, how long it lasts, and the spleen rule Morning sickness: what helps, when it peaks, and when it is hyperemesis Morton's neuroma: the pebble in your shoe that is not there Motion sickness or vertigo? Two kinds of dizzy, two different problems Motion sickness: why your brain gets seasick in a car Moyamoya disease: the narrowing brain arteries, the smoke-puff vessels, and the surgery that protects Mucormycosis: The Fast Mold Infection That Strikes When Defenses Are Down Multifocal Motor Neuropathy: Weakness Without Numbness, and the Treatment That Holds It Back Multiple myeloma: the bone-marrow cancer with the quiet start, and the modern treatments that changed it Multiple sclerosis: the immune attack on the wiring, and the drugs that changed the story Mumps: the swollen cheeks, and the testicle complication to know about Muscular dystrophy: the inherited muscle-wasting conditions, explained Myasthenia gravis: symptoms, treatment, and when to worry Myelodysplastic syndrome (MDS): when the bone marrow runs out of good blood cells Myelofibrosis: A Scarring Bone Marrow, a Growing Spleen, and the Treatment Map Myocarditis: the inflamed heart muscle after the virus Myofascial pain syndrome: symptoms, treatment, and when to worry Myxedema Coma: The Extreme End of Untreated Hypothyroidism

Nail fungus: confirming it, the treatments that work, and realistic timelines Narcolepsy: when the brain’s sleep switch flips without warning Nasal polyps: the soft growths that slowly switch off your nose Nausea: common causes, relief, and when to see a doctor Neck pain: what usually causes it, what helps, and the red flags Nephrotic Syndrome: Puffy Eyes, Foamy Urine, and What Comes Next Neuroblastoma: the childhood cancer of the nerve cells, the risk groups that steer, and the long campaign Neuroendocrine Tumors: The Slow Cancer With Hormone Symptoms Neurofibromatosis type 1 (NF1): the cafe-au-lait spots and what they can mean Neuromyelitis Optica: Attacks on Eyes and Spinal Cord, and the Prevention That Protects Them Neutropenia: Low Infection Fighters, the Fever Rule, and What the Numbers Mean Nickel allergy: the itchy rash from jewelry, buttons, and phones Nicotine Dependence: Why Quitting Is Hard, and the Three-Part Plan That Works Night blindness: symptoms, treatment, and when to worry Night sweats: from warm bedrooms to the causes that matter Night terrors: the screaming sleep episode your child will not remember Nipple discharge: symptoms, treatment, and when to worry Noise-induced hearing loss: symptoms, treatment, and when to worry Nonallergic Rhinitis: The Congestion With Negative Allergy Tests, and What Actually Helps Norovirus: the winter vomiting bug, the fluids, and the 48-hour quarantine Nosebleeds: how to stop one correctly, why they keep happening, and red flags Nummular eczema: the coin-shaped patches that itch and weep Nystagmus: The Eyes That Will Not Hold Still, in Children and in Adults

OCD: the intrusive thoughts and rituals that are not a personality quirk Obesity: What Is Actually Driving It, and What the Treatment Ladder Looks Like Objects stuck in a child's nose or ear: what parents should do Occipital neuralgia: the electric-shock pain shooting up the back of the head Oligodendroglioma: The Slow Brain Tumor With the Best Outlook in Its Family Opioid Use Disorder: A Treatable Illness, and the Medications That Cut Death Risk in Half Oppositional defiant disorder: symptoms, treatment, and when to worry Oral allergy syndrome: symptoms, treatment, and when to worry Orchitis: A Swollen, Painful Testicle and the One Thing to Rule Out First Orthostatic Hypotension: When Standing Up Makes the World Swim Osgood-Schlatter disease: symptoms, treatment, and when to worry Osteoarthritis: what wear and tear really means for your joints Osteomalacia: symptoms, treatment, and when to worry Osteonecrosis of the Jaw: The Bone-Drug Risk Every Patient Should Plan Around Osteopenia: the bone-density reading that is a warning, not a disease Osteoporosis: the silent bone thinning you find out about late Osteosarcoma: the bone cancer of the young, and the persistent-bone-pain rule Ovarian cancer: the bloating that was blamed on everything else, the surgery and chemo, and the CA125 after Ovarian cysts: usually harmless, and the warning signs Ovarian cysts: usually harmless, occasionally urgent Ovarian torsion: the sudden one-sided pelvic pain that is always an emergency Overactive bladder: the urgency that runs your day Ovulation pain: the mid-cycle twinge, explained

RSV and bronchiolitis: what parents need to know and the danger signs Rabies: The Infection Where Acting Fast After a Bite Is Everything Rash: common causes, what helps, and when to see a doctor Raynaud's: when fingers turn white in the cold Rectal prolapse: the bowel that slides out, and the surgery that fixes it Recurrent UTIs: symptoms, treatment, and when to worry Reflux in babies: symptoms, treatment, and when to worry Renal artery stenosis: the narrowed kidney artery, the blood pressure that stops obeying, and when a stent helps Restless legs syndrome: the urge to move that hijacks your evenings Retinal Vein Occlusion: The Eye's Stroke, and What Protects Your Sight Retinal detachment: symptoms, treatment, and when to worry Retinitis pigmentosa: the night vision that goes first, the inheritance questions, and the life built around the sight that stays Retinopathy of prematurity: the preemie eye check, what the stages mean, and the treatment window that matters Rett syndrome: the regression after normal development, the hands that stop working, and the therapies that rebuild a life Rh Incompatibility: When Your Blood Type and Your Baby's Disagree Rhabdomyolysis: symptoms, treatment, and when to worry Rheumatic fever: the strep that reached the heart, the years of prevention after, and the protection that works Rheumatoid arthritis: why the first months of treatment decide everything Rickets: symptoms, treatment, and when to worry Ringworm: the circular rash that is a fungus, not a worm Rocky Mountain spotted fever: the tick-borne fever that cannot wait Rosacea: the flushing and redness that is not acne Roseola: three days of high fever, then the rash that ends it Rotator cuff injuries: the shoulder pain that weakens your reach Rotavirus: the baby's vomiting bug that the vaccine now prevents Runner's knee: the front-of-knee ache on stairs and after sitting Ruptured eardrum: the pop, the pain, and the surprisingly good healing news

TIA (mini-stroke): the warning shot that must never be ignored TMJ and jaw pain: causes, the habits that feed it, and what actually helps TMJ pain (TMD): causes, relief, and when to get help TMJ pain or ear pain? Why the jaw joint is the great ear impersonator Tailbone pain: sitting on a bruised coccyx for weeks Takayasu arteritis: the inflamed great arteries, the young women it finds, and the quiet disease the team keeps it Takotsubo Cardiomyopathy: The Heart Attack That Wasn't, and the Recovery That Comes Tardive dyskinesia: symptoms, treatment, and when to worry Tarsal tunnel syndrome: symptoms, treatment, and when to worry Tay-Sachs disease: the gene both parents carry silently, what the diagnosis means, and the care that surrounds a child Teething: what is normal, what is not, and what actually soothes Telogen effluvium: the great hair shed after stress, illness, or childbirth Tendonitis: why sore tendons need loading, not just rest Tennis elbow: the outer-elbow pain that outlasts the match Tension Headache: The Daily Band of Pressure, the Painkiller Trap, and How to Break Both Testicular pain: the causes that cannot wait Testicular torsion: the sudden testicle pain that is a race against the clock Tetanus: The Rusty Nail Question, the Shots, and What Actually Matters Thalassemia: The Inherited Anemia, the Carrier Question, and the Lives Between Transfusions Thoracic outlet syndrome: the arm numbness from the squeezed tunnel at the neck Thrombotic Thrombocytopenic Purpura: What It Is and What Comes After the Hospital Thrush: why it keeps coming back and how to clear it for good Thyroid cancer: the neck lump that is usually highly curable Thyroid nodules: the common neck lumps that are almost always fine Thyroid storm: the overactive thyroid's emergency, and the road back from the intensive care unit Thyroid symptoms: underactive vs overactive and how testing works Tick bites and Lyme disease: removal, the rash, and when to get treated Tinea versicolor: the patchy summer skin that will not tan evenly Tinnitus: why it happens, what turns the volume down, and red flags Toe walking in kids: symptoms, treatment, and when to worry Tongue-tie: symptoms, treatment, and when to worry Tonsil stones: the white lumps behind stubborn bad breath Tonsillitis: sore throat, white patches, and when antibiotics help Tooth abscess: the dental infection that will not wait Tooth pain: what it usually means, pain relief that works, and red flags Torticollis in babies: symptoms, treatment, and when to worry Tourette Syndrome in Children: What the Tics Mean and How Life Goes On Toxoplasmosis: The Cat Question, the Pregnancy Rules, and What the Rest of Us Should Know Transverse Myelitis: The Sudden Spinal Inflammation, the First Days, and the Long Recovery Traveler's diarrhea: the holiday bug, the prevention, and the recovery kit Trichomoniasis: the common, curable STI behind the discharge Trichotillomania: the hair-pulling compulsion, and how to stop Trigeminal neuralgia: the electric-shock face pain with a hair trigger Trigger finger: the digit that clicks, catches, and locks Tuberculosis: Latent and Active, the Long Treatment, and the Cough That Counts Turf toe: the big-toe sprain that benches athletes Turner Syndrome: The Missing X, the Growth Question, and the Lives Girls Build Type 1 diabetes: the insulin-free pancreas and the daily management that replaces it Type 2 diabetes: symptoms, what the diagnosis means, and taking control Typhoid Fever: The Traveler's Fever, the Antibiotics, and the Food Rules That Prevent It

UTI or yeast infection: how to tell the difference UTI: symptoms, treatment, and when to see a doctor Ulcerative colitis: bloody diarrhea that demands a real diagnosis Unruptured brain aneurysm: the finding on someone else's scan, and the choice between watching and treating Ureteral Stricture: A Narrowed Urine Pipe and How It Is Fixed Urethritis: the burning pee and discharge that needs the sexual-health clinic Urinary Retention: What to Do When You Cannot Pee Uterine prolapse: the dragging bulge that pessaries and exercises manage Uveitis: The Red, Painful, Light-Sensitive Eye That Cannot Wait

Vaginal dryness: causes, comfort, and the treatments that work Vaginismus: the clamping that makes penetration impossible, and the way through Valley Fever: The Desert Fungus, the Pneumonia That Isn't, and the Fatigue That Lingers Varicocele: the bag-of-worms veins above the testicle, and when they matter Varicose veins: the bulging leg veins and what to do about them Vascular Dementia: What It Is, How It Progresses, and What Families Can Do Vasculitis: the inflamed blood vessels, from the mild to the serious Ventricular Septal Defect: The Hole in the Heart, the Murmur, and What Closes on Its Own Vertigo: BPPV and other causes, the Epley maneuver, and red flags Vestibular migraine: the migraine that makes you dizzy Vestibular neuritis: the inflamed balance nerve behind the sudden vertigo Vestibular schwannoma: the slow benign tumor on the hearing nerve, the one-sided hearing loss, and how to choose between watching and treating Visual Snow Syndrome: Seeing Static Everywhere, and Knowing It Is a Real Condition Vitamin D deficiency: the ache and tiredness half the world shares Vitiligo: the white patches and what drives them Vitreous detachment: symptoms, treatment, and when to worry Vocal cord nodules: the hoarseness your voice earns the hard way Vomiting in children: rehydrating properly, and the signs that mean get help Von Willebrand disease: the commonest inherited bleeding disorder you never heard of Vulvodynia: the vulval pain with nothing to see, and everything to treat

WPW Syndrome: The Extra Electrical Pathway, the Racing Heart, and the Procedure That Cures It Waldenstrom Macroglobulinemia: A Slow Blood Cancer and How It Is Managed Walking pneumonia: the mild atypical chest infection that lingers Warts and verrucas: which type you have, what works, and when to treat Wernicke-Korsakoff Syndrome: The Thiamine Emergency, the Memory It Takes, and the Window to Stop It West Nile Virus: The Mosquito Bite That Mostly Isn't, and the Rare One That Is Wheezing: symptoms, treatment, and when to worry Whiplash: the neck injury that blooms the day after the crash Whipple Disease: The Rare Infection Behind Years of Joint Pain, Diarrhea, and Weight Loss Whooping cough: the cough that comes in fits and lasts for months Wilms Tumor: Childhood Kidney Cancer, Treatment, and the Road After Wilson Disease: Copper Overload, Treatment for Life, and a Normal Future Womb cancer: the postmenopausal bleeding that must be checked, and the surgery that cures most

Yeast infection: symptoms, treatment, and when to see a doctor Yellow Fever: The Jungle Mosquito, the Vaccine That Works, and the Travel Rules

Zenker Diverticulum: A Throat Pouch That Traps Food and How It Is Fixed Zollinger-Ellison Syndrome: The Tiny Tumor Behind the Ulcers That Won't Quit