Patients with soreness in both bladders, the reasons are as follows: First, deltoid muscle strain: it may be due to a large number of recent over-exertion exercises, such as sports, playing badminton, tennis, or over-functional training of bilateral deltoid muscle, which will cause muscle strain, and therefore manifest as soreness and pain in both shoulders. Second, fever: the body’s basal metabolic rate will increase, which will cause lactic acid to accumulate in the joints and bones, often manifested as soreness of muscles and joints throughout the body. Third, cervical-shoulder syndrome: cervical-shoulder syndrome is a special manifestation of cervical cervical spondylosis, which can be mainly manifested as pain in the neck and shoulder, and if bilateral onset, it will be manifested as pain and discomfort in both sides of the neck and both shoulders.