The causes of shoulder clicking are usually related to friction between joint cartilage, tendon friction, and local pathology. Usually, friction between cartilage and tendons does not cause painful symptoms and is a normal physiological phenomenon. When the sound causes local pain, it is considered a pathological injury, such as rotator cuff injury, biceps longus tendinitis and other tendon strain diseases can cause the sound. Magnetic resonance examination can be used to rule out tendon and cartilage lesions; the results of the examination can be used to provide local symptomatic treatment. Biceps long head tendonitis has the highest incidence in clinical practice and can cause painful rales.