Having migraines is tough. They can make you super sensitive to light or sound, make you feel sick or even throw up. Some people might see weird patterns or feel numb or clumsy, or have trouble talking. There are lots of things that might set off a migraine like stress, being very tired, skipping meals, certain foods, or changes in hormones or weather. But these aren’t the main reasons they happen.

Dr. Seymour Diamond, who serves as the Executive Director of the National Headache Foundation, said that with new tech, scientists have found a possible main reason for migraines. They think it might be because a part of the brain near the top of the neck, called the brain stem, isn’t working right. This can make blood vessels near the brain swell up, which then starts a migraine.