Left chest tightness can go to the hospital can do chest X-ray, cardiac ultrasound, electrocardiogram to exclude cardiopulmonary disease, and then do esophageal and gastric examination, such as digestive tract, gastroscopy, etc. if necessary. For example, if it is chest wall muscle spasm or intercostal neuralgia, it can be treated as functional chest pain or chest wall pain, which can be treated with local heat, massage, physiotherapy, etc. If necessary, take anti-inflammatory and pain-relieving drugs, such as diclofenac sodium, etc. Pleurisy can be treated with anti-inflammatory and analgesic treatment, while pain in the esophagus and stomach should be treated with acid control and protection of gastric mucosa. Coronary heart disease, angina pectoris or myocardial infarction, pneumothorax, pulmonary embolism, and aortic coarctation are treated according to their causes. If it is caused by psychological problems, it is necessary to relax the spirit, maintain a good routine, avoid overexertion and enhance physical fitness, which are more helpful.