scientists aren't sure what causes migraines with aura. it's thought that at least two brain chemicals -- serotonin and dopamine -- play a role. according to the theory something goes awry in the way these chemicals regulate brain function. this may cause the brain and the body's immune system to overreact. when this 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. even more chemicals are released to help control the vessels' muscles. the vessels open and constrict. a severe often throbbing headache results. factors suspected of causing migraines with aura include genetics and being overweight. substances behaviors and environment may trigger migraines as well. it is known that migraines often run in families. they frequently begin in childhood and worsen through adolescence. although more boys than girls have migraines more adult women than adult men have migraines. over time the number of migraines lessen and they become rare after age 50. whatever the cause the good news is that -- although painful -- migraines with aura are not life threatening.
what causes a migraine with aura?