Scratching and ASD

I always have to watch myself that I don't start scratching myself because if I start it is hard for me to stop. It feels so good to scratch myself that I get carried away and scratch till I ooze and bleed. I usually scratch my arms, feet, nose, and crotch. Whatever is closest and itching the most gets my attention at that time. On my feet I use anti fungal cream to stop the itching and it works good for stoping it.