Headache: types, red flags, and when to see a doctor

The three you will actually meet are tension-type headache, migraine, and cluster headache. Tension-type is the everyday one: a dull, tight, band-like pressure on both sides, mild to moderate, and it does not stop you from functioning. Migraine is one-sided, throbbing, moderate to severe, worse with movement, and usually comes with nausea and sensitivity to light or sound; some people get visual aura first. Cluster headache is rare but unmistakable: excruciating pain around one eye, with tearing and a stuffy nose on that side, in attacks that arrive in clusters over weeks. There is also medication-overuse headache, a daily headache caused by taking painkillers too often, which matters because the fix is stopping the painkillers, not adding more.

A headache becomes an emergency when the pattern is wrong. The specific red flags: a thunderclap headache that hits maximum pain within a minute, often described as the worst headache of your life; headache with fever and a stiff neck you cannot bend to your chest; headache with weakness on one side, trouble speaking, confusion, fainting, or vision loss; a new headache after a head injury; a headache that is new or clearly different after age 50; one that steadily worsens over days to weeks, wakes you at night, or is worse when lying down; and a severe headache during pregnancy or in the first weeks after delivery. Any of these is a reason for urgent or emergency care the same day, not watchful waiting.

Most tension headaches respond to ordinary doses of acetaminophen or ibuprofen, water, food if you have missed a meal, and a break from screens. Migraine treatment has two parts: an acute medicine taken early in the attack (over-the-counter painkillers for mild attacks, triptans from a clinician for moderate to severe ones) and, when attacks are frequent, prevention, which ranges from sleep, meal, and trigger regularity to daily preventive medicines. Cluster headaches need a clinician because the treatments (high-flow oxygen, specific prescriptions) are not over the counter. One warning that cuts across all types: using painkillers on more than about 10 to 15 days a month can itself cause a daily headache, and the only way out is tapering off them.

Call 911 or get to an emergency room now for a thunderclap headache that peaks within a minute, headache with stroke signs (face drooping, one-sided weakness, slurred speech), headache with fever, stiff neck, and confusion or a rash that does not blanch under pressure, or a severe headache after a head injury, especially with vomiting or drowsiness. These are the patterns for bleeding around the brain, stroke, and meningitis, where minutes matter. A headache that is simply bad but matches your usual migraine pattern is miserable, not an emergency; the emergency call is about the pattern being new, sudden, or paired with the warning signs above.

Text or telehealth works well for the middle ground: recurrent tension headaches, known migraines that need a prescription refill or a better acute plan, and sorting out whether your pattern sounds like migraine, tension, or medication overuse. A clinician can review the history, adjust treatment, and send prescriptions remotely, because headache diagnosis is almost entirely story-based. What telehealth cannot do is the emergency work: a thunderclap headache, stroke signs, or fever with a stiff neck need an emergency room and imaging, not a chat. Texting an AI doctor is a fast way to check which bucket your headache is in before you decide where to go.

Morning headaches have a handful of common causes, and the pattern tells them apart. Poor or short sleep and irregular sleep times are the most common. Snoring or sleep apnea classically causes a dull morning headache that fades within hours. Medication-overuse headache is often worst on waking. Caffeine withdrawal hits people who sleep in on weekends. Teeth grinding overnight leaves a dull temple and jaw ache. Dehydration and alcohol the night before round out the list. A morning headache that is severe, progressively worsening over weeks, or comes with vomiting or vision changes is different and needs a doctor promptly, because that combination can signal raised pressure in the head. If yours is the dull, daily kind, texting a doctor about your sleep, caffeine, and painkiller habits usually finds the driver quickly.