Which of the following is listed as a trigger for migraines?

• A. Caffeine
• B. Regular exercise
• C. Adequate hydration
• D. Moderate sunlight exposure

Answer: (A)

Caffeine is a known trigger for migraines because its effects on brain chemistry and vascular tone can provoke headaches in some people. Regular caffeine use can lead to dependence, and stopping or reducing intake suddenly often causes withdrawal headaches, which can resemble or trigger a migraine. Inconsistent caffeine consumption can also set off attacks as the body reacts to changing adenosine signaling and blood vessel responses.

Regular exercise tends to reduce migraine frequency for many people and isn’t considered a trigger. Adequate hydration helps prevent dehydration headaches, so it’s protective rather than triggering. Moderate sunlight exposure is generally tolerated, though very bright light or glare can trigger photophobia in some individuals; it’s not a typical trigger in the same way caffeine is.