UTI (urinary tract infection)

Bladder infection, cystitis

Last updated October 19, 2026
Pymander Health editorial team. Every guide is checked against primary sources before it ships, and re-reviewed when guidance changes.

A urinary tract infection (UTI) is a bacterial infection, usually of the bladder, that causes burning when you urinate, frequent urgent trips to the bathroom, and lower abdominal pressure. Uncomplicated UTIs are treated with a short course of antibiotics, often prescribed remotely. Fever, back pain, or vomiting means the infection may have reached the kidneys, and that changes it to same-day care.

Get help now

Seek urgent care the same day for:

fever together with pain in your back or side below the ribs
vomiting that keeps you from keeping fluids or pills down
shaking chills, or new confusion (especially in an older adult)
UTI symptoms while pregnant, or symptoms in a man or a child

Those are kidney-infection or complicated-UTI patterns, and kidney infections can become dangerous quickly. Go to an emergency room rather than urgent care if there is confusion, fainting, a racing heartbeat with fever, or severe weakness, since those raise concern for sepsis.

What to do right now

Drink fluids and do not hold your urine. It helps you feel better and flushes the bladder, but it does not replace treatment.
For pain, acetaminophen or ibuprofen helps. Phenazopyridine (an over-the-counter urinary pain reliever) can numb the burning for a day or two; it turns urine orange, which is normal.
Do not start leftover antibiotics or someone else's. The wrong drug or a partial course breeds resistance and muddies testing later.
Book same-day care if you have fever, back or side pain, or vomiting. Otherwise, arrange treatment within a day or two: a classic UTI in an adult woman can often be handled by text or telehealth without an exam.

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Symptoms

Pain or burning when urinating
Needing to urinate often and urgently, with little coming out
Pressure or cramping in the lower abdomen or pelvis
Cloudy, bloody, or strong-smelling urine
Feeling tired or shaky

The pattern matters: burning plus urgency plus frequency, starting over hours to a day, is the classic picture. Signs the infection may have reached the kidneys are different: fever and chills, pain in the back or side below the ribs, nausea, and vomiting. If your main symptom is vaginal itching or unusual discharge without burning when you urinate, that points away from a UTI and toward something else entirely.

Common causes and risk factors

Most UTIs happen when gut bacteria, usually E. coli, get into the urethra and travel up to the bladder. Anything that shortens or disturbs that path raises the risk: sex (especially with a new partner), holding urine for long stretches, dehydration, spermicide use, and anatomy. They are far more common in women because the urethra is shorter. Pregnancy, diabetes, kidney stones, and anything that blocks urine flow raise the stakes, because infections in those situations are treated as complicated from the start.

How a clinician checks it

For a classic story in an adult woman (burning, frequency, urgency, no vaginal discharge), guidelines allow treatment without further testing, because the probability of a straightforward bladder infection is high. The look-alikes still get worked through: vaginal discharge or itching moves yeast or bacterial vaginosis up the list; a new partner or discharge moves chlamydia and other STIs up; severe one-sided flank pain that comes in waves moves kidney stones up. A urine dipstick or culture confirms the infection and guides the antibiotic when the story is not classic, symptoms keep coming back, or the first treatment fails. Fever, flank pain, vomiting, pregnancy, being male, or being a child each move the case out of the simple bucket entirely.

Treatment

Antibiotics for confirmed or classic UTIs: nitrofurantoin for 5 days, trimethoprim-sulfamethoxazole for 3 days, or a single dose of fosfomycin are common first-line choices for uncomplicated cases. Which one fits depends on your allergy history, local resistance patterns, and whether you have had recent UTIs.
Symptom relief: phenazopyridine for urinary pain (short-term), acetaminophen or ibuprofen, and fluids.
Kidney infection or complicated UTI needs prompt in-person evaluation and a longer or different antibiotic course.
Recurrent UTIs (3 or more in a year) deserve a workup, not just repeated prescriptions.

If you are not improving after two to three days on treatment, or you develop fever or back pain, get re-evaluated, because the bacteria may be resistant or the infection may have moved upward.

Can campus health or telehealth help?

Often yes. Uncomplicated UTIs in adult women are one of the conditions telehealth handles most routinely, because the symptom pattern is distinctive and the standard antibiotics are well established. After a remote evaluation a clinician can send a prescription to your local pharmacy, often the same day, and many cases never need an exam. Some services order a urine test at a nearby lab first. Campus health centers treat UTIs constantly and can usually test and prescribe in one visit. Remote care is not appropriate when the picture suggests something more serious: fever with back or side pain, vomiting, pregnancy, symptoms in a man or a child, or infections that keep coming back.

Cost and privacy notes

UTI treatment is one of the cheapest problems in healthcare: a telehealth visit plus a generic antibiotic is often less than a campus late-night ride to urgent care. If you are on a parent's insurance and want the visit kept private, the explanation-of-benefits letter is the thing to understand before you book: how EOBs work and how to keep care off them. No insurance at all: what care costs without coverage.

How long it lasts

Most people feel noticeably better within one to two days of starting antibiotics. Some mild bladder infections clear on their own within about a week, but many do not, and there is no reliable way to tell which yours will be. The risk of waiting is that an untreated UTI can travel up to the kidneys, which is a much more serious infection. If symptoms are mild and just started, fluids and watching for a day is reasonable for a healthy adult woman, but symptoms that are getting worse or lasting more than a day or two are a reason to get treatment rather than hope.

Prevention

Urinate after sex and do not hold urine for long stretches.
Stay hydrated; concentrated urine irritates the bladder.
If spermicides coincide with your UTIs, ask about alternatives.
For recurrent UTIs, a clinician may suggest a prevention plan; cranberry products show weak and mixed evidence and are not a treatment.

Common questions

What are the symptoms of a UTI?

A bladder UTI causes pain or burning when urinating, needing to urinate often and urgently with little coming out, pressure or cramping in the lower abdomen, and urine that is cloudy, bloody, or strong-smelling. Many people also feel generally run-down. Symptoms that suggest the infection has reached the kidneys are different: fever, pain in your back or side below the ribs, nausea, and vomiting. Kidney infections need prompt treatment, so that combination is a reason to get seen the same day rather than waiting it out.

Can a UTI go away on its own?

Some mild bladder infections clear on their own within about a week, but many do not, and there is no reliable way to tell which yours will be. The risk of waiting is that an untreated UTI can travel up to the kidneys, which is a much more serious infection. Guidelines generally recommend treating symptomatic UTIs with antibiotics, and treatment matters most if you have a fever, back pain, are pregnant, or are a man or a child, since those situations count as complicated.

How is a UTI treated?

Uncomplicated UTIs are treated with a short course of antibiotics. The usual first choices are nitrofurantoin for 5 days, trimethoprim-sulfamethoxazole for 3 days, or a single dose of fosfomycin; which one fits depends on your allergy history, local resistance patterns, and whether you have had recent UTIs. Most people feel noticeably better within one to two days of starting.

When is a UTI an emergency?

Seek urgent care the same day for fever together with pain in your back or side, vomiting that keeps you from keeping fluids or pills down, shaking chills, or new confusion, especially in an older adult. Those are signs the infection has reached the kidneys or the bloodstream. UTIs in pregnancy, in men, and in children are treated as complicated from the start. Go to an emergency room rather than urgent care if there is confusion, fainting, a racing heartbeat with fever, or severe weakness, since those raise concern for sepsis.

Can I get antibiotics for a UTI without seeing a doctor in person?

Often yes. Uncomplicated UTIs in adult women are one of the conditions telehealth handles most routinely, because the symptom pattern is distinctive and the standard antibiotics are well established. After a remote evaluation a clinician can send a prescription to your local pharmacy, often the same day. Remote care is not appropriate when the picture suggests something more serious: fever with back or side pain, vomiting, pregnancy, symptoms in a man or a child, or infections that keep coming back.

Think you have a UTI?

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