Realized what my Dermatophagia means to me

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My fiance has dermatillomania which means she will pick at her skin, usually her face. She has had contamination phobia with OCD and anxiety for quite some time. The skin issue is related to the contamination phobia because she feels 'cleaner' afterwards and like she is releasing something negative by the activity. The most likely is that the abuse she experience induced ptsd which related the contamination to the abuse and so she would pick whenever she got anxiety. She has since gotten it quite under control through a combination of medication and learning the root of the behaviour.