The ulnar nerve surgery is currently the most done, or the ulnar nerve relaxation surgery. This is not a minor surgery. 1, first of all, the ulnar nerve must be found, because in the whole process of treatment, especially during surgery, sometimes bleeding for the nerve is not particularly clear, and it is easy to confuse with the surrounding soft tissues and blood vessels. 2, the nerve surgery is not a minor surgery, because the nerve cells are special, and once there is ischemic necrosis, it is impossible to regenerate. Therefore, it is important to operate carefully during the surgery to avoid the appearance of medically induced injuries. If inadvertent ulnar nerve rupture occurs at a later stage, it can be treated by nerve anastomosis, but the long-term results are sometimes not always particularly satisfactory.3. There may be other blood vessels and nerves around the ulnar nerve, and it may also cause adhesions in the healing process later, forming a situation of surgical failure. Therefore, the surgery of the ulnar nerve should not be neglected, and it also needs to be treated in a timely and regular manner.