Left chest tightness and pain should be symptomatic relief for the cause, usually medication, common diseases are cardiac neurosis, myocardial ischemia, severe hypotension, other diseases. 1. cardiac neurosis: this is a mental illness or neurological dysfunction caused by cardiovascular symptoms of the main clinical syndrome, the acute onset of the main is to keep calm and stable emotions, oral alprazolam, sertraline and other anti-anxiety and depression drugs, but also oral metoprolol propranolol and other drugs to relieve cardiovascular symptoms. 2. Myocardial ischemia: Coronary heart disease and other diseases can lead to myocardial ischemia, affecting the coronary artery to the myocardial blood supply and oxygen supply. Medications are available, such as nitroglycerin, nifedipine, aspirin, clopidogrel and so on. If the patient is emotionally stressed, drugs such as diazepam and midazolam can also be used. If the condition is serious, interventional and surgical treatment is also feasible. 3. Severe hypotension: Severe hypotension will lead to insufficient oxygen supply to the heart muscle, and there will be left chest tightness and pain, which can be treated with medications, including fludrocortisone, midazolam hydrochloride, octreotide and so on. If accompanied by type 2 diabetes mellitus, acarbose can be used, and standardized treatment for the cause of hypotension. It should be noted that pneumonia, pneumothorax, benign lung nodules, lung malignant tumors, reflux esophagitis and other diseases can involve the left chest, it is recommended to go to the hospital in time, improve the examination to clarify the cause of the disease, and then give targeted treatment or standardized treatment.