1. Disinfection and dressing: If the area is small, it can be disinfected and bandaged to stop bleeding and change the dressing regularly.

2, stump repair: when the area is large and the bone is exposed, you can go to the hospital to trim the bone and sew the remaining skin.

3. Skin grafting: generally, abdominal pedicled skin flap is used for transplantation, or skin grafting can be directly taken from the inner forearm skin.