When patients lie on their side with chest pain, the common clinical causes are mainly the following: a. Thoracic spine compression fracture patients, when lying on the side can cause chest muscle pulling pain. At this time, it is recommended that the patient change to the lying position to reduce the pulling of the chest muscles to relieve the pain symptoms. For patients with serious symptoms of thoracic compression fracture, surgery can be considered to inject bone cement, which can reduce the pain symptoms in the chest. Secondly, if the patient falls accidentally during strenuous activities, resulting in chest muscle injury, with hematoma formation, lying on the side will also cause chest muscle compression pain. It is recommended that the patient take semi-recumbent position or lying position to reduce the local muscle tension. Fitalin ointment can be rubbed externally, and oral blood circulation and blood stasis pills can be taken to promote the faster absorption of muscle injury and reduce the pain symptoms in the chest.