I have a patch on my back up toward my right shoulder, maybe 4 or 5 inches or less around, that has episodes of extreme sensitivity. nothing seems to set it off. but i have to remove any clothing that touches it. It still hurts. then it goes away and i may not experience it for a day or days. i have had it for a few years and ignored it but it is more frequent now and actually hurts. I am 71.