I have an alter that used to hurt me. He would hit me really hard in the face, chest and stomach. I tried to stop him but if enough frustration built up or something went wrong he would blame and physically hurt the body. As I went through therapy I realized he was a part. So one day when he was telling me to hit my head against the wall I asked him why he wanted to hurt the body, why he wanted to hurt me. He eventually told me he was upset with us because we never acknowledged how much he helped us when we were young. It never occurred to me to say thank you for all the help he did for us when we were younger. I explained that I wasn't aware of us as parts until recently and didn't know he was a helper. I felt better being honest with him and he felt vindicated and aknowledged for is past efforts. We all thanked him sincerely. He will still on occasion tell us to hit our head or want to punch us when he becomes frustrated with something we can't do. But I accept his feelings and remind him that we have all agreed to not hurt the body. He get is and stops wanting to hurt us. I don't know if any of this will help but talking with him helped us both. Take care.