Sudden right-sided chest pain is commonly caused by heart and lung diseases. 1, it may be pneumothorax sudden strenuous activity lifting heavy objects in the case of shortness of breath, chest tightness, dyspnea, hypoxic cyanosis pay attention to chest fluoroscopy or chest CT, look at the lung compression. If the compression is greater than with 20%, breathing difficulties, consider giving surgical treatment, or closed drainage of the chest. 2, there is the possibility of angina pectoris, usually myocardial ischemia causing pain, no symptoms, severe pain, the attack time is short. Patients have a sense of frequent death, to do electrocardiogram and dynamic electrocardiogram and cardiac ultrasound, or cardiography, to rule out the possibility that it is myocardial ischemia and myocardial infarction. 3, aortic coarctation or pulmonary embolism lead to fatal patients, if necessary, aortic or pulmonary angiography to clarify the diagnosis.