Elbow canal syndrome i.e. ulnar nerve entrapment syndrome in the elbow Etiology: 1, tendon membrane or muscle compression, struthers arch tissue compression. 2, Recurrent dislocation or subluxation of the nerve. 3, rheumatoid synovitis of the elbow joint. 4, old injury: fracture of the medial epicondyle of the humerus not healing or deformed healing, elbow valgus, proliferative arthritis. 5. Departmental occupying lesions: tendon sheath cysts, lymphadenitis, tumors, etc. Clinical manifestations: abnormal sensation on the dorsal ulnar side of the ring little finger and palm, decreased muscle strength of the hand such as splitting fingers, finger weakness, abnormal strength to open the door and twist keys or write, etc. At present, some white-collar people, receive cell phones and send text messages every day, because the time spent receiving and playing cell phones is too long, and always flex the elbow joint when making calls, which will cause nerve stretching damage in the long term. Resulting in hand fatigue numbness, pain, arm sometimes can not lift, the symptoms are more severe for persistent pain, arm weakness, and even hold things will fall, in the forearm rotation forward when extended, but also often due to pain and limited activity. Countermeasures: Avoid bending the arm for a long time, or try to “open left and right”, let the hands take turns to relax and rest, and avoid prolonged pressure on the elbow. The elbow joint should be properly moved, you can also use a hot towel to relieve muscle tension. Experts remind that if you notice an increase in the frequency of symptoms such as soreness and numbness in the arms and other parts of the body, or if such symptoms occur within a very short period of time, you should go to the hospital immediately. Diagnosis: Specialist hand surgery visits and electromyography help clarify the diagnosis. Treatment: Conservative treatment such as braking and nerve nutrition can be used for those with clear diagnosis, short duration of disease and mild symptoms; those with ineffective conservative treatment or long history of disease, impaired motor fixation and anatomical abnormalities should be investigated surgically as soon as possible. Surgery: Elbow ulnar nerve release anteriorly requires brachial plexus anesthesia, and the release anteriorly is divided into subcutaneous anteriorly or deep anteriorly. After surgery, the elbow should be fixed in a cast in a flexed position for 2-3 weeks. Warm tip: The early stage of elbow canal syndrome can be treated conservatively with oral blood-activating and neurotrophic drugs, massage and massage; there are also some adjuvant treatments such as thermotherapy, i.e. hydrotherapy, waxing, ultrasound or hot compress to improve local blood circulation and promote the inflammation to subside, but the effect is still very limited. Generally, after 2 months of conservative treatment, if there is no improvement, then active surgery should be performed to explore and loosen the muscle, otherwise atrophy of the muscle occurs at an advanced stage, even if surgery is performed, the recovery of nerve function is still poor.