The causes of pain on both sides of the upper chest not being able to breathe may be caused by pneumothorax, intercostal fasciitis, lung infection and other diseases. 1. Pneumothorax: Pneumothorax will cause pain on both sides of the upper chest, the patient will have obvious chest tightness, usually accompanied by coughing, dyspnea, palpitations and other adverse symptoms, and may cause shock in severe cases. 2. Intercostal fasciitis: pain on both sides of the upper chest can not breathe, may also be the discomfort caused by intercostal fasciitis, the affected area will be accompanied by swelling, tingling and other adverse symptoms, after strenuous exercise will be more intense discomfort, and some patients will also have pain in the back. 3. Lung infection: lung infection can also cause pain on both sides of the upper chest can not breathe, the patient is usually accompanied by fever, there will be obvious coughing, coughing up sputum, chest tightness and other symptoms, there will be weakness of the limbs, may lead to dizziness, headache and other discomforts. Such adverse symptoms need to seek medical treatment in time, through the relevant examination, according to the doctor’s advice to choose the appropriate treatment.