A migraine hangover usually lasts about a day, and it can run three.
Research puts the average postdrome at about 25 hours, within a 24 to 72 hour range. Here's how that compares to the rest of the attack, and why your own number matters more.
How long does a migraine hangover last?
Usually about a day, and sometimes up to three. Research on the migraine postdrome, the after-phase most people call a migraine hangover, reports a mean duration of 25.2 hours and a typical range of 24 to 72 hours after the headache resolves (Bose & Goadsby 2016).
So the fog, the heavy limbs and the light that still stings the morning after all belong to the attack. The pain stopping doesn't mean the attack is over.
The shape of those numbers matters too. The mean sits just above the bottom of the range, which suggests many people clear in roughly a day while a smaller group carries symptoms into day two or three. If you're in that second group, the research already describes you. You're the tail.
25.2 h
Reported mean duration of the migraine postdromeBose & Goadsby 2016
24 to 72 h
Typical postdrome range after the headache endsBose & Goadsby 2016
How the hangover compares to the rest of the attack
Next to the other phases, the postdrome stops looking like an afterthought. The International Classification of Headache Disorders (ICHD-3) puts an untreated or unsuccessfully treated migraine headache at 4 to 72 hours, and each aura symptom at 5 to 60 minutes. The postdrome's range runs right alongside the headache's.
And that changes the math on a single attack. A 12-hour headache followed by a 25-hour hangover adds up to 37 hours. In a lot of diaries, only the first 12 get written down.
Phase
Typical duration
Source
Prodrome
Can start hours or a day or two before other symptoms
ICHD-3
Aura
5 to 60 minutes per symptom
ICHD-3
Headache
4 to 72 hours (untreated or unsuccessfully treated)
ICHD-3
Postdrome (migraine hangover)
24 to 72 hours, mean 25.2 hours
Bose & Goadsby 2016
Duration of each migraine phase, from the ICHD-3 criteria and published postdrome research.
Aura and headache limits from ICHD-3. Postdrome mean and upper range from Bose & Goadsby 2016.
Why the average can't give you your number
A 25-hour mean describes a group. It can't tell you whether your own hangover runs 10 hours or 60, and published research hasn't settled why one person's tail runs long and another's stays short.
Ignoring that spread has a practical cost. ICHD-3 defines chronic migraine by headache days: 15 or more a month for over three months, with migraine features on at least 8 of them. Hangover days aren't part of that count. They still cost you work, childcare and plans, and a clinician weighing preventive treatment only sees them if you bring them in.
So the number that matters is yours. A handful of logged attacks will tell you more about your own tail than any average.
Hangover days aren't headache days
ICHD-3 counts headache days toward a chronic migraine diagnosis. Postdrome days fall outside that count, so if you want your neurologist to see them, log them separately and bring the totals.
How to time your own postdrome
The method is simple. Note when the headache stops. Then keep logging the symptoms that stay behind (brain fog, fatigue, residual photophobia, neck stiffness, low mood) until you'd call yourself back to baseline. The time between those two points is your hangover.
Postdrome was built around that stretch of time. It keeps logging after the pain ends, on one continuous timeline, so the after-phase shows up as hours on the record. Aura Mode is designed for logging when you can't see straight. Your data stays on your device and exports when you want to hand it to a clinician. You pay once for lifetime access, with no subscription.
When a long migraine hangover needs a clinician
Most hangovers fade on their own. A few patterns call for a doctor, though. ICHD-3 has a name for a debilitating headache phase that runs past 72 hours: status migrainosus. That's a reason to contact your doctor or urgent care.
Less urgent but worth raising at your next appointment: a postdrome that's getting longer from one attack to the next, or one that no longer looks like your usual pattern.
Get emergency care for these
A sudden, severe headache that peaks within about a minute. New weakness, numbness, trouble speaking, confusion or vision loss that doesn't clear the way your aura usually does. Fever with a stiff neck. None of these are a normal migraine hangover.
Start timing your own migraine hangover
Most migraine trackers stop logging when the headache stops. Postdrome keeps going through the 24 to 72 hours after it, on one continuous timeline, so the fog, fatigue and residual photophobia show up as real hours you can bring to your neurologist. Your data stays on your device and exports when you need it, and you pay once for lifetime access instead of a subscription.