Have you ever wondered why you get a brain freeze and then instantly it goes away? Well researchers found the answer to that mystifying question “What causes a brain freeze?” Through extensive research they found that when something cold is in contact with the roof of the mouth, it causes the capillaries in the brain to flood with blood immediately. It happens specifically the anterior cerebral artery. The pain comes from the artery closing down to its normal state. Researches also believe that it could be an answer that could lead to ways to cure and prevent migraines.