Foot drop according to the severity of the disease, the common peroneal nerve injury is relatively light general recovery time is generally at least 1~2 months, the common peroneal nerve compression or even extend to half a year, the condition is serious may not be able to recover. 1. Common peroneal nerve injury: foot drop is generally considered to be caused by trauma or postoperative injury to the common peroneal nerve, if the simple nerve contusion, the common peroneal nerve is not broken, the degree of injury is relatively mild, foot drop can be recovered in general. In case of peroneal nerve contusion, the foot can be dorsiflexed in 1~2 months by taking oral nutritional nerve medication such as methylcobalamin tablets. 2. Compression of common peroneal nerve: If the common peroneal nerve is compressed, early emergency surgery can be taken to relieve the nerve from compression, and the foot ptosis can be improved in 3 months, and if the compression time is too long, the recovery time will be extended to half a year. 3. Dissection of common peroneal nerve: If the nerve is completely dissected, the dorsiflexion function of the foot may not be restored even after repair and suture. Foot drop may not be recovered. It is recommended to actively seek medical advice and treatment under the guidance of a physician for foot drop.