Hidden pain on both sides of the upper chest may be physiological factors, but also may be the manifestation of certain diseases, such as pneumothorax, lung infection, tumors, cervical spine, thoracic spine disease, etc., and should be promptly consulted to find out the cause of the disease. 1. Physiological factors: If there is a vague pain on both sides of the upper chest, it is usually caused by muscle and soft tissue contusion of the chest wall. This kind of pain is related to movement, as well as coughing, talking and other actions, and most of them do not need to be treated, and can be relieved by resting. 2. Pathologic factors (1) Pneumothorax: if pain occurs on both sides of the chest, accompanied by chest tightness and breath-holding, it is necessary to consider whether there is a spontaneous pneumothorax, especially if the chest tightness and breath-holding are more serious, and it is necessary to be alert to bilateral pneumothorax. (2) Lung infection: If the pain on both sides of the chest is accompanied by fever, cough, yellow pus sputum and other symptoms, it is necessary to consider whether there is a bilateral lung infection. (3) Tumor: If bilateral pain in chest is accompanied by prolonged emaciation, fatigue and other feelings, it is necessary to consider whether there is a lung malignant tumor or pleural malignant tumor. (4) Cervical and thoracic spine diseases: for example, herniated intervertebral disc and spinal stenosis may also cause pain on both sides of the chest. If there is pain on both sides of the chest, which is not significantly relieved after resting, you need to go to the hospital for further examination to avoid delaying your condition.