Ulnar nerve damage will take about 3 months to 1 year to recover, depending on the severity of the ulnar nerve injury and the effect of treatment. If there is an acute ulnar nerve injury, timely treatment through surgery and postoperative treatment with vitamin B1, methylcobalamin and other nutritive drugs for the nerve, it will take about 3 months to 6 months to recover. If there is a transection injury of the ulnar nerve, it will take at least 6 months to 1 year to recover through surgical treatment for nerve anastomosis. It is recommended to check the severity of ulnar nerve injury in time and take appropriate measures to treat the condition.