Although a bad migraine might make you wish for the end of everything, headaches are not usually life-threatening. However, a severe headache can signal something much more serious and requiring emergency attention, such as stroke, aneurysm, and meningitis.
These are not terribly common, but it's worth watching for a headache that feels markedly different from normal–even if normal is agonizing. Here are three signs to watch for.
"The thing we're taught to look for is someone claiming to have 'the worst headache of their life,'" says Adam Wilkes, MD, an ER specialist at Lankenau Hospital in Wynnewood, Pa. "It may mean that they have an aneurysm in the brain that has begun to leak a little blood, but could turn into a catastrophic full bleed. And that can be life threatening."
If you go to the emergency room, expect the doctors to perform a CT scan, which can reveal a bigger problem. "We always like to be bothered," says Dr. Wilkes. "Let me decide if there's a problem or not. I'd so much rather have people come in unnecessarily and reassure them and send them home, than miss something that could have helped saved their life."