In clinical practice, there is often an inability to straighten the arm. The first step in the treatment is to analyze what is causing the problem. In clinical practice, most of the cases are caused by a fracture in the elbow joint, which leads to a limitation of joint movement. First of all, functional exercises should be carried out as soon as possible under the guidance of a rehabilitation doctor without affecting the fracture position. Before the functional exercise, it can also be combined with local acupuncture, moxibustion, hot compress, and physiotherapy instrument baking electricity. The purpose is to promote local blood circulation and reduce local swelling, and then active and passive functional exercises are carried out. With proper functional exercises, most patients with limited elbow joint, will recover. In addition, if the patient has ossifying myositis, it can also lead to an inability to straighten the arm. Most clinical treatment is surgical, but osteochondrosis is prone to recurrence and sequelae after surgery.