Caffeine and Coffee Withdrawal Headaches
By Steady Matcha Editorial · Founder, Steady Matcha
Published June 21, 2026
Coffee withdrawal headaches are caused by cerebral vasodilation: caffeine normally constricts blood vessels in the brain, and when you stop, they dilate rapidly, causing a throbbing headache. They typically begin 12 to 24 hours after the last dose and peak at 20 to 51 hours. Tapering gradually, staying hydrated, and OTC pain relievers are the most effective treatments. This is general information, not medical advice.
Why does quitting coffee cause headaches?
Caffeine is a vasoconstrictor: it narrows blood vessels throughout the body, including in the brain. When you consume caffeine regularly, your brain adapts to this constriction. When you stop, the vessels dilate rapidly, causing the throbbing, pressure-like headache characteristic of caffeine withdrawal.
This is the same mechanism behind caffeine's effectiveness as a headache treatment. Caffeine is an active ingredient in Excedrin and other OTC headache medications precisely because it constricts the dilated vessels that cause headaches. A 2004 systematic review in Psychopharmacology by Griffiths et al. found that headache is the most common caffeine withdrawal symptom, affecting approximately 50% of people who stop abruptly. This is general information, not medical advice.
Headache is the most common caffeine withdrawal symptom, affecting approximately 50% of people who stop abruptly - Griffiths et al., Psychopharmacology, 2004
How long does a caffeine withdrawal headache last?
A caffeine withdrawal headache typically begins 12 to 24 hours after the last dose, peaks at 20 to 51 hours, and resolves within 2 to 9 days. The headache is usually described as throbbing or pressure-like, often bilateral (both sides of the head), and may be accompanied by nausea.
The duration depends on how much caffeine you were consuming and how abruptly you stopped. Heavy coffee drinkers (4 or more cups per day) typically experience more intense and longer-lasting headaches than light drinkers. Tapering gradually (10 to 25% per week) prevents the rapid vasodilation that causes the headache.
Caffeine withdrawal headache peaks at 20 to 51 hours and resolves within 2 to 9 days - Griffiths et al., Psychopharmacology, 2004
How do you stop a caffeine withdrawal headache?
Several strategies are effective for caffeine withdrawal headaches. OTC pain relievers (ibuprofen or acetaminophen) are the most direct treatment. Staying well-hydrated helps because caffeine is a mild diuretic and dehydration worsens headaches. A small amount of caffeine (from matcha or tea) can relieve the headache by reconstricting the dilated vessels, though this delays the withdrawal process.
The most effective prevention is tapering gradually rather than stopping cold turkey. Replacing coffee with matcha during the taper provides enough caffeine to prevent the rapid vasodilation that causes the headache, while reducing total caffeine dose over time. This is general information, not medical advice.
Tapering with matcha prevents withdrawal headaches. See Steady Matcha.
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References
- Caffeine dependence syndrome: evidence from case histories and experimental evaluations - Psychopharmacology (2004)
- FDA - Spilling the Beans: How Much Caffeine is Too Much? - FDA (2023)
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