A typical migraine attack lasts between 4 and 72 hours when untreated, according to the International Headache Society’s diagnostic criteria. But the full experience, from the earliest warning signs to the foggy aftermath, can stretch well beyond that window. How long your migraine lasts depends on whether you treat it, how you treat it, and which phase of the attack you’re counting.
The Four Phases of a Migraine Attack
A migraine isn’t just a headache that switches on and off. It moves through up to four distinct phases, and the headache itself is only one of them. Not everyone experiences every phase with every attack, but understanding the full sequence explains why migraines can feel like they consume days of your life.
The prodrome is the early warning period. You might notice food cravings, mood changes, neck stiffness, frequent yawning, or difficulty concentrating. In a clinical trial tracking these premonitory symptoms, about 82% of prodrome events were followed by a headache within one to six hours. A small percentage of people experience prodrome symptoms that precede the headache by more than six hours, and occasionally by more than 24 hours.
The aura phase affects roughly one in four people with migraine. It typically produces visual disturbances like zigzag lines, blind spots, or flashing lights, though it can also cause tingling, numbness, or difficulty speaking. Most auras last between 5 and 60 minutes and usually resolve before the headache begins. In rare cases, aura symptoms can persist for a week or longer.
The headache phase is the 4-to-72-hour window that defines a standard migraine attack. The pain is usually throbbing or pulsing, often on one side of the head, and worsens with physical activity. Nausea, vomiting, and extreme sensitivity to light and sound are common during this phase.
The postdrome, often called the migraine hangover, follows the headache. More than 80% of people with migraine experience it. You may feel exhausted, mentally foggy, sore, or emotionally drained. This phase lasts anywhere from a few hours to two full days.
Total Duration From Start to Finish
If you add up all four phases, a single migraine episode can span roughly one to five days. A prodrome that starts six hours before the headache, a headache that lasts a full 72 hours untreated, and a postdrome that lingers for 48 hours adds up to more than five days of impaired function. Most attacks are shorter than this worst case, but even a moderate migraine with a brief prodrome, a 12-hour headache, and a half-day hangover easily eats into two days.
Effective treatment shortens the headache phase significantly. The most effective medications for stopping an attack mid-course are a class of drugs called triptans. A large network analysis published in The BMJ found that certain triptans produced pain freedom within two hours for a meaningful proportion of patients, and some also sustained that relief through 24 hours. Over-the-counter options like ibuprofen also performed well for sustained pain freedom in that analysis. The earlier you treat an attack, the shorter it tends to be.
When a Migraine Lasts Longer Than 72 Hours
A migraine that continues unbroken for more than 72 hours crosses into a recognized complication called status migrainosus. The International Headache Society defines it as a debilitating migraine attack that persists beyond 72 hours with unremitting pain. Brief interruptions of up to 12 hours from medication or sleep don’t reset the clock. Status migrainosus typically requires medical intervention beyond standard at-home treatments, and the severity can lead to dehydration from prolonged nausea and vomiting.
Chronic Migraine Is a Different Pattern
Some people don’t just have long individual attacks. They have frequent ones that blur together. Chronic migraine is diagnosed when you have headaches on 15 or more days per month for more than three months, with at least 8 of those days meeting the criteria for migraine. This pattern is distinct from episodic migraine, where attacks happen less frequently with clear headache-free stretches in between.
Chronic migraine often develops gradually. Someone who starts with a few attacks per month may find them increasing over time, especially if they frequently use pain relievers. Overuse of acute medications can itself fuel more frequent headaches, creating a cycle that’s difficult to break without preventive treatment.
Migraines in Children Are Often Shorter
Children and teenagers can have migraine attacks as short as two hours, compared to the four-hour minimum used for adults. Their attacks also tend to be less one-sided, with pain across the forehead rather than concentrated on one side. The shorter duration can make pediatric migraine harder to recognize, since many people associate migraines with day-long episodes. A child who has recurring two-hour bouts of head pain with nausea and light sensitivity likely meets the criteria.
Red Flags With a Long-Lasting Headache
Most migraines, even prolonged ones, are not dangerous. But certain features of a long-lasting headache signal something more serious than migraine. Seek emergency care if you experience any of the following alongside a headache:
- Sudden, explosive onset: a headache that reaches peak intensity within seconds, sometimes described as a thunderclap.
- Neurological changes: slurred speech, vision loss, weakness or numbness in your arms or legs, confusion, or memory loss.
- Fever with a stiff neck: especially combined with nausea and vomiting, which can indicate infection.
- Worsening over 24 hours: a headache that steadily intensifies rather than fluctuating or responding to rest.
- First severe headache of your life: particularly if you’re over 50 or have a history of cancer or a weakened immune system.
- Onset after physical exertion or head injury: including weightlifting, sex, or any trauma.
These patterns can point to conditions like bleeding in the brain, meningitis, or blood clots that require immediate evaluation. A migraine you’ve had before that follows its usual pattern, even if it’s lasting longer than you’d like, is far less concerning than a headache that behaves in ways you’ve never experienced.