My current therapist knows I cut I mean she would probably find out anyway so I figured it be best if she heard it from me. I have told when I actively self harm and she always makes sure I am being "careful" and if I do cut deep that I would seek treatment but in the past I have not been honest about it but I was a minor then so my parents told her anyway. I think if you hide things from your T or Pdoc how are they supposed to treat you accurately and also if you ever get admitted to the hospital and you sign a release for your T or Pdoc they are going to find out anyway and I also find if you upfront with them they tend to over react less at least in my case. I also didn't get the feeling that they thought I was being overly dramatic