In principle, edema suggests that you should drink less water, and you should be clear about the cause of edema, because after edema there is a large amount of water and sodium retention, which can manifest itself in both lower extremities and the face, and there may be significant concave pressure edema. Edema may be cardiogenic, pulmonary, hepatogenic, or nephrogenic. In cardiogenic origin, there is mainly panic and chest tightness, a large amount of water and sodium retention that cannot be excreted, and possibly hypertension at the same time. If it is of pulmonary origin, there may be underlying diseases of the lungs, and drinking more water may easily lead to higher pressure in the lungs, resulting in increased dyspnea and even pulmonary edema. In contrast, hepatogenic dysplasia is mainly low-protein edema, which should be supplemented with protein. Edema of nephrogenic origin must control the amount of water drunk, too much water may easily lead to aggravation of the symptoms of renal failure.