Everyone talks abour "flare ups." What IS a flare up and how do you feel when you are not in one? I hurt all the time and skin burns. I have severe pain in my head most of the time. How do I know the difference if I'm having "normal" fm pain or a flare up? I'm on Neurontin 600mg 2xd/Effexor 75mg/Elavil 1mg bedtime.