After a tendon rupture in the shoulder, the following treatment measures should be taken. 1. First, the shoulder joint should be kept immobilized and braked. In this case, doctors usually use an abductor brace to immobilize the shoulder joint, which can provide significant pain relief. 2. Surgery of the shoulder joint should be performed at an early stage. For this type of injury, conventional conservative treatment is very ineffective and requires early surgical treatment. The principle of surgery is mainly to suture and repair the ruptured tendon. If the exercise site is close to the tendon stop, then rivets are used for fixation. The anchor nail is first pierced inside the bone to achieve a secure fixation point. Afterwards, the tendon is secured by sutures at the end of the nail. If the exercise site is in the body of the tendon, then it needs to be repaired with sutures.3. After the surgery, a series of anti-inflammatory, anti-swelling, pain-relieving, and anti-infective medications should be administered. After the patient has reached a certain level of recovery, the patient also needs to do the corresponding functional exercises under the guidance of the doctor.