More than 40 percent of those of us with fibromyalgia suffer with various types of headaches. They can be very debilitating and render us pretty much useless for the duration. Some headaches we can push through and some we definitely can't. I remember the first time I experienced a cluster headache soon after my fibromyalgia diagnosis. I didn't know it had a name. I just called it an eye headache. It starts behind one of your eyes and affects that side of your head. It's incredibly uncomfortable and sometimes I get a bit of relief by covering up that eye with my hand. Of course, I also use a pain medication. I've never had a migraine, but I know lots of people who do. Along with the intense pain, you experience nausea and/or vomiting. Lights or sounds may contribute to the extreme pain. Some people have strange visual disturbances, including blind spots, blurred vision, flashing lights, and zig-zaging lines, also known as aura. Migraines are believed to be caused by abnormal activation of the central nervous system that leads to the narrowing and inflammation of the blood vessels in your head. They can last from a few hours to a few days.