Generally speaking, when patients have symptoms of left chest pain, they should first consider the symptoms caused by coronary heart disease, angina pectoris and myocardial ischemia. At the same time, pleurisy, tuberculosis or pneumothorax may also have symptoms of left chest pain. In addition, the clinical symptoms of intercostal neuralgia and costochondritis may also occur. Therefore, it is suggested that patients should first go to a regular Grade III A hospital for a detailed examination. They can take an electrocardiogram and a color Doppler ultrasound of the heart, and at the same time cooperate with chest CT to make a clear diagnosis, and then carry out targeted and effective treatment under the guidance of doctors. It is suggested that patients must maintain a happy attitude, avoid emotional tension and anxiety, and pay more attention to rest and avoid strenuous exercise. In terms of diet, do not eat spicy, stimulating, greasy and cold food.