The manifestations of heart failure at night include chest tightness, dyspnea, cough, sputum, abdominal distension and so on. 1. Chest tightness: mainly due to night sleep, position change, increased return blood volume, heavier heart load, relative ischemia of myocardium, chest tightness symptoms. 2. Difficulty in breathing: it is common to wake up during sleep with suffocation, and serious patients may sit up and breathe, unable to sleep flat. 3. Coughing and sputum: heart failure, elevated pulmonary venous pressure, pulmonary siltation, tissue fluid leakage into the alveoli, coughing, coughing white foamy sputum, no pus odor, severe patients may cough pink foamy sputum. 4. Abdominal distension: a large amount of blood pools in the digestive tract, causing abdominal distension, loss of appetite, nausea and other symptoms. Combined with previous history of heart disease, when the above symptoms occur, should be timely to the hospital, as soon as possible to clarify the cause of the disease, standardized treatment.