This seems to be pretty common in ASDs because there have been previous posts about it. As IdahoRose said, it's called dermatillomania, and also Neurotic Excoriation, or Chronic Skin Picking. Me and my daughters do it (and they did it independently, they didn't learn it from me). Here's a really useful website about OCD skin picking: http://www.skinpick.com/skin-picking-ocd
And another one:
http://www.trich.org/about/skin-faqs.html
Quote:
Though skin picking often occurs on its own-unconnected to other physical or mental disorders-it is important to identify whether or not skin picking is a symptom of another problem that needs treatment. For example, skin picking could be a symptom of illnesses such as dermatological disorders, autoimmune problems, body dysmorphic disorder, obsessive-compulsive disorder, substance abuse disorders (such as opiate withdrawal), developmental disorders (like autism) and psychosis. Establishing whether skin picking is an independent problem or a symptom of another disorder is an important first step in creating an appropriate treatment plan.
I don't think there is enough information or research out there on its relation to autism, there is definite information about it being an OCD behaviour, but of course we are prone to OCD behaviour anyway and I think they should make the link more categorically to autism itself.
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*Truth fears no trial*
DX AS & both daughters on the autistic spectrum