"I used to do this in my sessions too. My to would hold my hands to get me to calm down and stop usually. "

"I too shake a lot and scratch at my arms but like Starry Night my t holds my hands or arms to stop me."

I think that it's crazy your therapist will touch. I've been reading here for some time and read some therapists will ask them to stop, tell them it makes them uncomfortable when you don't talk, or tell you not to cover your eyes or do something, etc. My therapist would never touch me...if she did, I'd definitely stop hurting myself, but I'd probably start shaking. I would be really scared if she touched or held my arms. I would probably also start crying because I feel like I need to do it to make myself feel more grounded and just better when I'm talking or not-talking.
I have definitely bled and caused marks on my arm from doing it, but I don't think she would mention it unless I did first....

I also just started talking to her about my sh, so she may bring it up, but I doubt it. I think she'd only talk to me about something that I feel comfortable talking about. She has given me fidges, though, if she sees me doing it, but I am often too embarassed to use them so I just continue.