I have been having this problem for awhile now. I will get an area on my body that is sensitive to the touch, then next day somewhere on my body near it grows a blister that is very very painfull to the touch and looks like a bunch of little pimples in on big clump.
This used to happen on occasion like once every 2-3 years now its happening one after another.
My skin on my lower party of my legs is also doing something odd, that it randomly has a sore on it that looks like an ingrown hair then turn into a large blister type thing. This started this past january and only happened once in awhile, but now are forming one right after the other as well.