Pain in the middle of the back on the right side is mainly due to two reasons: first, due to muscle overwork, such as the middle of the back on the right side of the position of the scapular raphe and large rhomboid muscle, small rhomboid muscle, these muscle tissues if there is excessive tension contraction state, it is easy to strain, such as in the sitting position when the head down for too long, so that the muscle will show tension, due to the lack of support for bilateral elbow position support The lack of support for the bilateral elbow position will lead to continuous muscular exertion, and excessive fatigue over time will form a strain injury that will produce local inflammatory lesions, which may lead to local inflammatory edema of the muscle fibers, or stimulation of the peripheral nerves, and painful symptoms will occur. Secondly, due to the cold in this position, especially when sitting and sleeping at night, maintaining a posture for too long accompanied by local cold, will lead to muscle tissue becoming more tense, blood circulation will decline, leading to local inflammatory metabolites, due to the decline in venous return to accumulate and increase, will also lead to obvious pain symptoms.