Pain above the left chest is usually caused by cardiovascular diseases, respiratory diseases, chest wall diseases, etc. The department should be selected according to the corresponding disease manifestations. 1. Cardiovascular diseases: middle-aged and elderly patients with hypertension, hyperlipidemia, diabetes, pain above the left chest after exertion, satiety, agitation, consider coronary heart disease, it is recommended to go to the Department of Cardiology; if it is a sudden pain above the left chest, the pain is severe, accompanied by dyspnea, sweating, and even a sense of imminent death, consider the attack of acute cardiac infarction, aortic coarctation, and should be immediately referred to the Department of Emergency Medicine. 2. Respiratory diseases: if the patient has fever, cough, sputum manifestation, and at the same time appears above the left chest pain, consider pleurisy, massive pneumonia, etc., the patient can consult respiratory internal medicine: if the patient’s body type is thin and tall, or has previous lung diseases such as pulmonary blisters, emphysema, etc., and after strenuous activities or sudden changes in body position appears sudden chest pain with dyspnea, consider pneumothorax, and it is recommended to consult the Department of Thoracic Surgery. 3. Chest wall diseases: if there is a history of trauma, the pain above the left chest may be a fracture of the chest wall; if there is a history of previous median open-heart surgery, thoracic spine disease, redness, swelling, heat and pain or herpes on the local skin of the chest wall, it is considered to be costochondritis or intercostal neuritis, and it is recommended to consult the thoracic surgery department and dermatology department. Patients with pain above the left chest should go to the hospital in time and choose the relative treatment under the guidance of the doctor to avoid delaying the condition.