Nerve injuries usually include both central nerve injuries and peripheral nerve injuries. Central nerves include the brain and spinal cord, and peripheral nerves include 12 pairs of cerebral nerves, 31 pairs of spinal nerves and vegetative nerves, each of which plays a different role in the human body. According to the different parts of the damaged nerves, the after-effects are also different. 1. Central nerve injury: it often occurs after cerebrovascular disease, which can lead to dysfunction of sensation, movement, swallowing, speech, etc., abnormal pain, temperature and touch sensation, paralysis of one side of the limbs, choking, aphasia. 2. Peripheral nerve injury: there are often weakness of limbs, hypesthesia, hyporeflexia or loss of reflexes. Common manifestations are as follows: Brachial plexus nerve injury: it will be manifested as limitation of upper limb activity, drooping of the whole upper limb, inability to retract or bend the upper arm; muscle atrophy of the hand, appearing as “claw-shaped hand”. Axillary nerve injury: it manifests as impaired movement of shoulder joint, impaired skin sensation of deltoid muscle, muscle atrophy, shoulder peak bulge, forming “square shoulder”. Radial nerve injury: radial nerve injury caused by trauma or traction, due to the loss of wrist force will appear “hanging wrist”. Ulnar nerve injury: the ring finger and little finger will have dysfunction of adduction and abduction, and loss of sensation in the little finger. Osteosynovial nerve injury: motor disorders such as difficulty in lifting the legs when walking and sensory disorders of the skin on the inner side of the calf. Sciatic nerve injury: manifested by atrophy of buttock, posterior thigh and calf muscles, obstruction of knee bending, impaired movement of ankle joint; loss of sensation of posterior and lateral thigh, and foot. For nerve injury, it needs to be treated under the guidance of professional physicians according to the condition.