Chest tightness and weakness are mainly considered for the following reasons:1. Coronary artery disease, myocardial ischemia, this patient may have hypertension, diabetes mellitus, hyperlipidemia and other risk factors in the past, can be in the activities and other myocardial oxygen consumption increases in the case of the onset of the examination of the electrocardiogram and ultrasound of the heart can help to clarify the diagnosis.2. Heart failure, this patient may have hypertension, diabetes mellitus, coronary artery disease, cardiac valvular diseases, the basis of daily activities appear to varying degrees of limitation.3. The patients may have hypertension, diabetes, coronary artery disease, heart valve disease, and different degree of limitation of daily activities, and the examination of NT-proBNP and cardiac ultrasound can help to make a clear diagnosis.3. Lung diseases, the most common of which are chronic obstructive pulmonary disease and bronchial asthma, cause hypoxemia, which results in chest tightness and weakness, and the examination of chest CT and lung function can help to make a clear diagnosis.4. Mental and psychological factors, which are accompanied by nervousness, anxiety, and mental stress, can help to make a clear diagnosis. This kind of patient is accompanied by nervousness, anxiety, and high mental pressure. Encourage patients to exercise more and divert their attention, which can help to improve the situation.