Numbness of fingers after debridement surgery is mostly caused by nerve injury, surgical injury and hemodynamic disorder. 1. Nerve injury: Nerve injury exists before the debridement surgery, and the hand will be numb after the surgery due to the pain masking the symptoms during the preoperative evaluation. 2. Surgical injury: during the debridement surgery, due to soft tissue pulling, it may cause nerve edema, or electric knife contusion of nerves and blood vessels, so that the damage to the upper limb nerves, there may be hand numbness, and the cutaneous nerve will also appear numbness when pulled, but usually only sensory deficits, there is no dyskinesia. 3. Blood transportation obstacles: due to slow blood flow, or the affected limb has blood clots and other factors affecting blood transportation, hand numbness will occur after surgery. It is recommended to contact the surgeon for related treatment.