I. What is shoulder arthroscopy Shoulder joint pain seriously affects people’s quality of life. Shoulder arthroscopy is a fiber optic device the size of a chopstick, 4 mm in diameter. The procedure is performed by entering the shoulder joint through a 5 mm skin incision and projecting a clear picture of the tissues within the shoulder joint onto a high-definition monitor through a cable. The lesions within the shoulder joint can be diagnosed more clearly, allowing for targeted treatment. The treatment effect is obvious and the risk of surgery is much lower than that of incisional surgery. This technology has become very popular in advanced and developed European and American countries, Japan and Korea. 2. The advantages of shoulder arthroscopy 1. small incision, small chance of infection and minimal skin scar; 2. traditional incisional surgery before, with more bleeding, blurred vision, higher chance of nerve and muscle damage, long recovery time and unsightly scars. Shoulder arthroscopy is a minimally invasive surgery with little trauma, high surgical safety, and repeatable surgery if necessary; 3. One arthroscopic surgery can treat multiple diseases at the same time. It is the best treatment method for shoulder impingement syndrome, joint labral tear, rotator cuff disease, and shoulder instability; 4. There are few contraindications, such as poor physical condition that cannot perform conventional surgery and elderly patients, etc. Arthroscopic surgery can be considered. What can be done by shoulder arthroscopy? Systematic examination of shoulder joint pain or restricted movement, surgery to release the adhesive band of frozen shoulder, repair tendon injury, repair cartilage or glenoid labrum injury, suture the torn rotator cuff tissue, treat acromioclavicular arthritis, and remove the free body. IV. Possible complications of shoulder arthroscopy Shoulder arthroscopy complications are very low and rare reports: infection, bleeding, nerve injury.