Yes! Coffee Can Cause Headache?|Dr.N Ramya| ENT,Head & Neck Surgeon(JIPMER)

Sleep loss. Lack of sleep can trigger a migraine attack, and caffeine may keep you from getting enough shut-eye. You can still have traces of caffeine in your system for up to a full day after consuming it.

Allergic reaction. It's rare, but some people can be allergic to caffeine. Symptoms can include headaches as well as a skin rash, breathing problems, and digestive issues like nausea or diarrhea. Even a small amount could trigger a reaction.

Caffeine and migraines

Many doctors recommend that people with migraines avoid caffeine. It's not clear exactly why caffeine, or foods and drinks that contain it, seem to trigger migraines in some people. But researchers do know that caffeine can block the effects of a chemical in your cells called adenosine. Adenosine causes blood vessels to expand, and levels of it in your blood increase during migraine attacks.

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