*possible trigger

I have been seeing a therapist who knows about my self harm. After a bad episode with PTSD-related symptoms, she asked me if I had been self harming. I told her I had, and she asked what I used and where I SHed.

I have never had a T ask me that before. My past Ts just asked me if I'd been SHing and left it at that. I guess I am just curious why it would matter to know what and where?