Side sleeping shoulder pain is mostly caused by shoulder diseases and myofasciitis, which can be relieved by the following methods: First, try to lie flat when sleeping to avoid shoulder pressure, which can prevent further aggravation of shoulder lesions and also relieve pain. Second, physical therapy, you can use microwave physiotherapy or far-infrared physiotherapy, which can reduce the local inflammation and relieve the pain. Third, oral medication, you can take oral pain medication, such as meloxicam, celecoxib, loxoprofen sodium tablets, at the same time, you can take oral Chinese medicine, such as Dahuluo Dan or Guaqi Zhuangbiao granules, which can play the role of meridians, pain relief. Fourth, external drug treatment, you can use ointment paste, such as Tongluo dispel pain cream paste, you can also use Futalin ointment topical, which can effectively relieve pain.