Dr. Maike Blaya, a well-known headache specialist in South Florida, couldn’t shake a persistent headache that had come on fast. The pain intensified and traveled down her neck. She considered consulting with a colleague but ultimately pushed through the pain and continued seeing patients. About a week after the headache began, she suffered a seizure, dropped to the ground in front of her bedroom closet, struggled to speak, and fell into a coma. “I had all the red flags,” she said.