Read the article: Caffeine Headache: Why It Happens and How to Manage It
https://www.healthgrades.com/right-care/migraine-and-headache/caffeine-headache?cid=63emHLN040323MIG
Do an experiment either on yourself or with a family member/friend using caffeine. Have you/them drink/eat the same higher amount of caffeine for a few days or week. Then you/them should stop caffeine intake "cold turkey." Write up the effects of this experiment in a lab report.