I don't do it with the intention of injuring myself and I'm not all like "oooooh yes finger bleed, pain is good" etc. but I can't stop picking at the skin around my fingers even when I know it's going to look bad and it's going to bleed, and be sore. sometimes i pick so deep I can touch it and feel the nerve ending going crazy. I do it because I want the skin to be smooth and even., not lumpy, scabby, hard, or with loose skin. It HAS to be flat, smooth and also i hate brown/black scabs/dried dark blood so I have to pick that too. I'll start subconsciously, and then I'm so annoyed that I didn't notice what I was doing, because then I know, I will HAVE to finish it no matter how bad it gets. As a result, I have scars on my hands from scabs I picked to death and my fingers look horrible like some wild animal savaged them. I also do this with my lips, spots which become scabs especially on my nose. I put savlon cream on after to stop it rescabbing and keep it smooth so I won't need to pick the next day. but eventually thr skin becomes uneven again and I have to pick it off again because it's not perfect.