Why Are Migraines So Debilitating?

Nearly 40 million Americans battle migraines.

Migraines are more than an average headache for people like Lisa Simeone. 

"I get tugging right at the base of my skull," said Simeone. "If I don't get on my medication or do something right away, it'll start to come over the top of my head and start to manifest itself over my entire head and sometimes behind my eyes and my ears." 

She’s not alone. Nearly 40 million Americans battle the condition, according to the American Migraine Foundation.