Generally, nerve damage from heel surgery can be categorized into functional damage and structural damage. If it is caused by postoperative hematoma and other functional injuries such as nerve compression, through the second surgery to solve the compression situation, usually can be restored to normal; if it is because of the nerve structure damage caused by nerve dissection, usually more difficult to restore normal. 1. Impairment of nerve function: Nerve function abnormalities caused by nerve compression due to postoperative hematoma, tissue compression, etc. can be restored to normal by resolving the nerve compression, such as performing a second surgery. 2. Damaged nerve structure: the continuity and integrity of the nerves are damaged due to nerve severance caused by surgical operation errors, etc. Since nerve cells, like skeletal muscle cells and cardiac muscle cells, are non-renewable cells, it is impossible to repair the nerve cells through regeneration once they die. Nerve damage caused by this condition is often difficult to reverse and it is harder to return to normal.