I know next to nothing about drugs, but the compulsive skin-picking may very well be due to your heroin use, but I don't really know. I do know that some addicts often feel sensory hallucinations that there's bugs crawling under their skin and they have to scratch. I think this is common in crystal meth users, but I don't have any idea if it applies to heroin- I mentioned it because I read on another one of your posts that you're hearing voices. Anyway, I'm a compulsive skin picker myself, but I have OCD, so that's why I do it. Mine never gets nearly as bad as yours- I pick at my scalp and toes (mostly scalp), but I've never gotten such wounds as pus-filled, infectious areas. Mine also differs because I DO feel pain, and though I will pick my scalp when I'm just waking up and still half-conscious, I notice what's going on once I start. My mom always yelled at me before she found out it was the OCD, but the areas on my scalp are just scabs; they bleed when I pick them and ooze, but that's it. If you have gotten down to fatty tissue, you seriously need to get some sort of antibacterial bandage from a doctor because that could get really infected. But I know all about the urge to pick despite the painful consequences. I don't really know why I pick my head. I know my toes are because I want the skin to feel smooth and "perfect," but as for my scalp, I think I just like the feeling afterwards. Who knows? God bless, and if you have any more questions, feel free to ask!
-GatsbyLuvr1920-