Adhesive capsulitis Commonly known as frozen shoulder, it is mostly seen in people around 50 years old. The pain in the shoulder joint is severe, with sleepless nights and gradual joint stiffness. The disease can gradually heal itself after about 1.5 years, but the course of the disease is longer and more painful. Arthroscopy is suitable for patients who have had the disease for about 3 months. At this stage, the lesion is mainly congestive synovitis. Arthroscopy can reduce the inflammation and interrupt the course of the disease, which is an active and effective treatment method. Calcific tendonitis The main clinical manifestation is episodic shoulder pain with unbearable pain and calcific shadows visible on X-ray. A toothpaste-like white substance is visible in the supraspinatus tendon under arthroscopy. Clearing away these calcified mortars quickly relieves the symptoms. Rotator cuff injuries Injuries to the rotator cuff tendons are mostly degenerative and commonly occur in middle-aged adults. Repair through arthroscopy and anchoring the injured tendon to the bone surface with anchors can reduce pain and restore strength. Acromioclavicular impingement This is also a cause of shoulder pain, mainly manifested as increased pain in forward flexion and internal rotation of the shoulder joint, with osteophytes visible under the acromion on x-ray. Through arthroscopy, the bone spur can be ground off and the symptoms can be reduced. Bankart injury Simply put, this is an injury to the anterior glenoid labrum caused by repeated anterior dislocations of the shoulder joint. Arthroscopy can be performed to fix the anterior glenoid labrum with sutures to restore the normal mechanics of the joint and prevent recurrence of dislocation. SLAP injury This is an injury to the superior glenoid labrum of the shoulder joint, where the long head of the biceps tendon is also attached, and can be fixed by arthroscopic suturing.