Can Coffee Cause Headaches?

Yes, coffee can both cause and treat headaches. Caffeine constricts blood vessels in the brain; when you skip your regular cup, a sudden increase in blood flow can cause a caffeine withdrawal headache. Conversely, consuming excessive amounts of coffee can trigger migraines or tension headaches due to overstimulation. Consistency in daily consumption is key to avoiding these issues. Source: National University Hospital / HealthHub Singapore