What is migraine without aura and what causes it?
“Migraine without aura” is a relatively new name for the most common type of migraine headache. Another name you might hear is common migraine. These migraines don’t have an aura. Aura is the name for early unusual symptoms some people notice shortly before a migraine starts. Scientists aren’t sure what causes migraines, including migraines without aura. It’s thought that at least two brain chemicals — serotonin and dopamine — play a role. The theory is something goes awry in the way these chemicals regulate brain function.This causes the brain and the body’s immune system to overreact.When that happens, a flood of immune response cells flows through the blood vessels to the brain.The brain’s blood vessels open wider to accommodate these cells.Then even more chemicals are released to help control the vessels’ muscles. The vessels open and constrict. A severe, sometimes throbbing headache results. Factors suspected of causing migraines include genetics and being overweight. Substances
