Scientists from New England Center for Headache in Stamford have concluded that Harry Potter might have had migraines.
They tracked the progress of the headaches from the time Potter was 11 years old all the way to 17. The good scientists even published a paper on the subject in Headache: The Journal of Head and Face Pain - "Harry Potter and the Curse of Headache."
These are the symptoms that led to the migraine diagnosis:
- Headaches began around age 11
- Severe stabbing pains in the trigeminal nerve
- Headaches were one-sided
The paper does admit that the attacks lasted only a short time, however. Also, in the books, the only trigger Harry Potter had was Lord Voldemort.
link: Diagnosing Harry Potter's Headaches