I am a sufferer of cluster headaches. The easiest way I can explain it is like a migraine(it actually is) that everyone associates with but it doesn't last as long but happens more often. For me, medically, this is listed as chronic. (Yeah, isn't that great!) I have been really well lately, until very recently. The last few days have been terrible.
The real reason I post this so if it seems my chipper self is not in the last few posts or it doesn't seem like I have visited your blog lately, I am sorry. Being alive just hurts.