[footfootfoot]

Originally Posted by Pete Zicato

I'll put an intestinal blockage against cluster headaches on the pain-o-meter. Especially since a blockage can go on for 24 hours or more.

I'll give you the benefit of the doubt, but day-um.

Peter Goadsby, a neurologist and headache specialist at the University of California, San Francisco, has commented:

Cluster headache is probably the worst pain that humans experience. I know that's quite a strong remark to make, but if you ask a cluster headache patient if they've had a worse experience, they'll universally say they haven't. ... Women with cluster headache will tell you that an attack is worse than giving birth. So you can imagine that these people give birth without anaesthetic once or twice a day, for six, eight or ten weeks at a time, and then have a break.[1]

Many cluster headache sufferers have committed suicide, leading to the nickname "suicide headaches" for cluster headaches.