Dyspnea and chest tightness in dialysis patients at night may be caused by heart failure, elevated blood pressure and psychological problems. 1. Heart failure: it is heart failure caused by any factor that damages the heart muscle or affects the pumping of blood in the heart, resulting in abnormal blood supply to the lungs, which is mainly manifested as dyspnea, chest tightness, limitation of physical activity and fluid retention. 2. Elevated blood pressure: patients on dialysis generally have high blood pressure, and dialysis can lead to elevated blood pressure induced left heart failure, dyspnea, chest tightness and other symptoms will occur. 3. Psychological problems: patients may also be due to psychological overstress and other psychological problems triggered by neurasthenia can be accompanied by respiratory nerve center abnormalities, which in turn leads to dyspnea, chest tightness. Dialysis patients night dyspnea, chest tightness may also be seen in the dialysis is not sufficient and other reasons, if the dialysis patients night dyspnea, chest tightness symptoms, persistent non-relief, the need for timely medical treatment.