Left chest fork pain, need to be based on the specific cause to determine the treatment, generally need to pay attention to rest and symptomatic treatment. 1. diaphragm spasm and irritation, such cases are usually caused by exercise after eating a full meal, it is recommended to stop for rest, do not carry out strenuous activities for the time being. 2. Pneumothorax, for thin tall young people and older people with a history of pneumothorax or COPD, need to be alert to whether the pneumothorax is caused by pneumothorax, which needs to be determined by chest radiographs in a specialized hospital, generally conservative treatment can be selected according to the severity of the pneumothorax whether to perform a thoracocentesis extraction. 3. Heart disease, due to myocarditis, angina pectoris or coronary heart disease and other diseases, this symptom will also appear, which needs to be diagnosed, symptomatic medication. Therefore, it is recommended to consult a doctor in time and use medication under the guidance of a professional physician.