Patients with heart failure who have fluid retention need to take oral diuretics all the time, but the duration of oral diuretics should be determined according to the individual differences of each patient, for example, acute heart failure attack will suddenly appear acute dyspnea, wheezing, chest tightness, shortness of breath and other symptoms and even double lower extremity edema, mainly due to the increase in the volume load of the heart, and should be given intravenous diuretics treatment. After the acute stage of patients at home to maintain the treatment, mainly to give oral diuretic treatment, such as hydrochlorothiazide and spironolactone at the same time to give oral, can be once a day oral, continuous oral one week can be changed to every other day oral once, at the same time, to monitor the patient’s blood pressure, heart rate and the situation of double lower limb edema, if the conditions permit, to the hospital to check the serum ions to see whether there is a lack of potassium.