Those you that have known me for some time know I suffer from cluster headaches. From Wikipedia:
Cluster headaches are rare, extremely painful and debilitating headaches that occur in groups or clusters. They may also be described as “suicide headaches”, a reference to the excruciating pain and resulting desperation that has culminated in actual suicide.
A lot of people think they’re migraines, but they’re not. They rate much higher on the pain scale than a migraine. They affect men more than women. They are fast onset headaches, so fast that oral medications don’t work, I have to give myself an injection of Imitrex when I get one. There is the other difference – where migraines happen ever so often, clusters can happen in my case 3 to 4 times per day over a 6-8 week period of time. And when they’re done, they’re usually gone for a year. I’m lucky about that, some people the remission only lasts for a few months or so. Anyway, I found this video on YouTube, and it’s scarily eerie to what happens to me when I have to suffer through one (fortunately that isn’t too often).