Patients lying on the side of the chest pain, generally speaking, the common clinical reasons are mainly the following: First, the patient’s strenuous activities inadvertently hit the chest, which can cause local soft tissue injury, in the lateral position of the injured part if squeezed, will cause obvious pain symptoms. At this time, the patient can reduce the tissue exudation through local ice packs, 24 hours after the use of hot ammo packs, moxibustion fumigation, blood circulation and blood stasis cream coated with external, at the same time, oral pain, bruise pills and other drugs, to promote the faster recovery of the injured soft tissues, reduce the pain symptoms in the chest. Secondly, localized fracture caused by chest injury will also cause chest pain when lying on the side. Patients need to improve the local X-ray or CT examination as soon as possible, to clarify the severity of the fracture, if necessary, surgical internal fixation, postoperative analgesic, anti-inflammatory, anti-infection treatment can be given as soon as possible to solve the symptoms of chest pain.