I remember when I told mine. It was accidental actually, but I guess it was for a reason. I was talking about my new friend and my T asked me to describe her. After I started going, I mentioned "and she has deep scars on her arm." At that moment, my heart sunk, because I, first, didn't want to say that, and second, didn't know how she would react. By that time, I had been SH on and off for a couple years, and at that moment, hadn't relapsed for a few months. My T asked more about it, and I explained that my friend had battled with it before but for the most part has overcome it. She then confronted the big question... "Are you cutting?" I panicked at that moment, honestly. I wasn't and hadn't for a while, but I felt I would be lying if I said I wasn't, especially because I was having bad urges at the time. I looked at her for a few moments, signed, and said no. She looked pretty concerned after that, but dropped it. By the next session, I had relapsed and she brought it up again and I told the truth. We talked about it for a while and I asked if she was going to tell anyone. She said that since I let her see them and they were not dangerously deep or life-threatening, she wasn't going to tell anyone. That was 3 years ago. I have relapsed many times after that and she, while was upset in a loving way, supports me through the tough times. It made it easier once it was out in the open and kept me in check with how I was *really* doing rather than hiding. All I can say is don't worry. A good T won't over react and will help you through this, just like anything else. Many people do/has done it and Ts have seen their fair share.