Shoulder tendinitis is commonly seen in supraspinatus tendinitis, infraspinatus tendinitis, and long head of the biceps tendinitis. The treatment is mainly conservative. During the acute phase of tendinitis, resting, immobilization, and wearing protective gear are recommended. Secondly, oral intake of non-steroidal anti-inflammatory drugs can be considered. Thirdly, traditional Chinese medicines can be taken orally or applied topically. Fourthly, injection therapy can be considered, which usually has good effects. Fifthly, physical therapy is an option, including heat therapy and microwave therapy, with a special recommendation for shockwave therapy, which is very effective for tendinitis throughout the body. If conservative treatment is ineffective, surgical treatment may be necessary, tailored to the specific tendon involved.