I used to get these types of shocks a lot more when in the begining years of my illness. It feels like your being bitten by mad bees. I had terrible pain in my head and suffered from migraine headaches constantly.
I found the best treatment is to try and relax and get away from the stress.
When we are hyped up due to being worried about our symptoms it seems to get the nerves all jumpy too. But if you can try and put away the worry for a short time each day, and then for longer times each day, it will help with this form of pain.
It always seemed for me that symptoms came in for a bit, long enough to get be really scared, then leave, then a few days later I would get hit with some new symptom. It was a merry-go-round that often made me feel crazy. I hope being here on this forum helps all of you deal with fibro.
