JOHN BAVOSI / SCIENCE PHOTO LIBRARY JOHN BAVOSI / SCIENCE PHOTO LIBRARY
Migraine. Artwork of the blood vessels leading to and fro the brain, and a man holding his head with the pain (red concentric circles) of a migraine. Migraines are severe, repeating headaches, often accompanied by other symptoms such as nausea and photophobia (dislike of bright light). A migraine starts when blood vessels to the head dilate after a period of constriction.
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