Persistent Headache: Why It Won't Go Away and When to Worry

What counts as a persistent headache

Doctors use a few overlapping terms:

• Chronic daily headache: headache on 15 or more days a month for more than 3 months.
• New daily persistent headache: a headache that starts on a specific, memorable day and never goes away, present daily from within 24 hours of onset.
• A prolonged attack: for example, a migraine lasting more than 72 hours, called status migrainosus.

Most persistent headaches are primary headaches, meaning the headache itself is the condition. A minority are secondary, caused by something else.

Common causes

Chronic tension-type headache

A dull, pressing, band-like pain on both sides of the head, often with tight neck and shoulder muscles. It does not usually worsen with activity and has little nausea. Stress, poor sleep, posture and anxiety drive it. See tension headache.

Chronic migraine

Migraine that occurs on 15 or more days a month, at least 8 of which have migraine features: throbbing, often one-sided pain, nausea, sensitivity to light and sound, and worsening with activity. Episodic migraine can transform into chronic migraine, especially with painkiller overuse, poor sleep, obesity and caffeine.

Medication overuse headache

Taking pain relievers too often makes headaches more frequent. Medication overuse headache develops with:

• simple painkillers (acetaminophen, ibuprofen, aspirin) on 15 or more days a month
• triptans, opioids or combination painkillers (including those with caffeine or codeine) on 10 or more days a month

Headaches often worsen for a week or two after cutting back, then improve.

Other common contributors

• Caffeine: daily intake and withdrawal both trigger headaches.
• Sleep problems: insomnia and sleep apnea (morning headaches with snoring).
• Jaw problems: teeth grinding and TMJ disorders cause temple and jaw pain.
• Eye strain from uncorrected vision or long screen use.
• Dehydration and skipped meals.
• Sinus disease: chronic sinusitis causes facial pressure with congestion, though many "sinus headaches" are actually migraines.
• After a head injury: post-concussion syndrome causes headaches for weeks to months.

Serious causes

Brain tumors rarely cause a headache alone. Most persistent headaches, even severe ones, are not caused by tumors.

How doctors find the cause

A headache diary for 4 to 8 weeks is one of the most useful tools: record days with headache, severity, triggers, painkillers taken and menstrual cycle. A doctor will ask about the headache pattern, medication use, sleep, caffeine, stress and red flags, and examine blood pressure, eyes (including the back of the eye) and the nervous system.

Most people with a typical pattern and a normal exam do not need a scan. MRI or CT is recommended for red-flag features. Blood tests (ESR and CRP) are done urgently for suspected giant cell arteritis. An eye exam checks for swelling of the optic nerve.

Treatment

• Stop medication overuse: limit simple painkillers to fewer than 15 days a month and triptans or combination painkillers to fewer than 10 days. A doctor can help plan withdrawal.
• Preventive treatment for chronic migraine or tension-type headache: medicines such as amitriptyline, topiramate, propranolol or candesartan; for chronic migraine also CGRP-targeting medicines and botulinum toxin injections.
• Acute treatment used sparingly: NSAIDs, acetaminophen (paracetamol) or triptans, following directions.
• Non-drug treatments: regular sleep, meals and exercise, limiting caffeine, staying hydrated, physical therapy for neck problems, cognitive behavioral therapy and relaxation training.
• Treat secondary causes: sleep apnea, dental or jaw problems, sinus disease, raised pressure or arteritis.

Frequently asked questions

Why do I have a headache that won't go away?

The commonest reasons are tension-type headache, migraine and overuse of painkillers, often combined with stress, poor sleep or caffeine. Less often, sinus or dental problems, a recent head injury, or rarely a serious condition are responsible. A doctor can identify the type and plan treatment.

When should I worry about a persistent headache?

Worry if it is sudden and severe, steadily worsening, worse lying down, or comes with fever, stiff neck, confusion, weakness, vision loss or seizures. New headaches over age 50, in pregnancy, or after a head injury also need prompt assessment.

How long is too long for a headache?

A tension headache usually lasts hours to a few days, and migraine up to 72 hours. A headache lasting more than 3 days, or headaches on most days of the month, should be evaluated by a doctor. Any headache with red-flag symptoms needs urgent care.

Can taking painkillers cause daily headaches?

Yes. Using painkillers on 15 or more days a month, or triptans and combination painkillers on 10 or more days, can cause medication overuse headache. Reducing use, with your doctor's guidance, usually improves headaches after a temporary worsening.

Could a persistent headache be a brain tumor?

It is unlikely. Brain tumors rarely cause headache alone. Warning signs include a progressively worsening headache with seizures, weakness, vision changes, personality change, or vomiting. A doctor can decide whether a scan is needed.