I can't find anything on this and I'm not sure how well I can describe it but I can actually feel my skin touching. For years I thought it was normal and the people around me just learned to put up with it or something but when I finally got the courage to ask someone if it was normal, I realized it wasn't.
The sensation isn't painful, just really uncomfortable. I used to toss and turn all night trying to get my skin to stop touching but my rheumatologist* recently put me on sleeping meds and I can finally sleep again at night. I can't remember a time I didn't have this sensation, and neither can my mother. Ever since I was a little kid I wouldn't wear socks or shoes because they made my toes cramp and touch. To this day I still can't wear socks and if I wear shoes that fit I start screaming and freaking out because the discomfort is overwhelming.
The oddest part is if, I say, put my left hand on my right arm it doesn't bother me. But my toes, fingers, thighs, underarms, and so on drive me insane. I also get crawling sensations sometimes when there's nothing there that stay for well over ten minutes before they finally stop.
*I've had rheumatoid arthritis since I was a young child. Don't think this is related though because I've brought up the skin sensations to my rheumatologist and he never said anything. We don't know whether anything ran in my mother's father's family or my father's father's family (my mother doesn't know her father and my father knew his but the man died when my father was 15), but the only known diseases that run in my parent's families are; rheumatoid arthritis, cervical cancer, mental disorders (not sure what - something like Asperger's syndrome), Alzheimer's, high blood pressure, anxiety, fibromyalgia, and that's all I can remember right now. As far as I know I'm the only in the family that has this though.