Chest tightness, back pain consider the following reasons: 1, to consider the possibility of coronary heart disease, unstable angina, acute myocardial infarction. Patients with unstable angina pectoris and acute myocardial infarction often present with chest tightness and chest pain, located in the anterior chest, the middle and lower part of the posterior sternum, ranging from about the size of the palm of the hand, and lasting for a period of time that can range from 3-5min to more than half an hour, accompanied by profuse sweating. To do electrocardiogram and myocardial injury necrosis marker examination, further confirm the diagnosis. 2, chest tightness, back pain, but also pay attention to the possibility of arterial entrapment, aortic entrapment of patients can be manifested as severe pain in the chest. 3, chronic gastritis, gastric ulcers can also be manifested in the back of the chest soreness.