Subacromial bursa effusion is treated according to the cause. The common causes of subacromial bursitis are subacromial bursitis, acromioclavicular impingement, frozen shoulder, etc. The treatments include physical therapy, medication, local puncture and hormone injection, arthroscopy, etc. 1. Subacromial bursitis: hot compresses can be used, physical therapy such as high frequency ultrashort wave treatment can also be used, if the patient’s bursitis symptoms are relatively heavy, and after applying other conservative treatments, the symptomatic relief is not obvious. Often use local puncture to draw fluid hormone injection therapy, so as to control the sterile inflammation of the bursa, such as ultrasound-guided injection of compound betamethasone lidocaine. 2. Acromioclavicular impingement: localized hot compresses and physiotherapy can be carried out, and topical ointment that activates blood circulation and removes blood stasis can be used to assist in the treatment, such as musk bone-strengthening ointment. Use diclofenac sodium extended-release tablets to control inflammation and relieve pain. Surgical shoulder arthroscopy can be performed for patients with severe impingement of the acromion. 3. Freezing shoulder: Oral tizanidine hydrochloride tablets can be taken to relieve muscle spasm, and ibuprofen extended-release capsules can be taken to reduce inflammation and analgesia when the pain is severe. Hot compresses, massage, physiotherapy and other auxiliary treatments can be used. Functional exercises for the shoulder joint, including active and passive abduction, rotation, extension and flexion, and cricoid rotation, can help restore the normal function of the shoulder joint. If there is fluid in the subacromial bursa, there may be other causes such as rotator cuff injury, and it is necessary to consult a doctor in time to clarify the cause of the disease and treat it. All of the above medications should be used under the guidance of a doctor, avoid self-medication.