There are many reasons for leg edema at night, the causes can be poor circulation in the legs, cardiovascular disease, renal disease, severe liver disease, endocrine disorders and so on. Common clinical diseases that cause leg edema include right heart failure, hypertension, phlebitis, nephrotic syndrome, glomerulonephritis, advanced cirrhosis, malnutrition, hypothyroidism, etc. Sedentary and sedentary healthy people can lead to poor circulation in the legs and cause leg edema. Patients with edema need to go to the hospital for electrocardiogram, cardiac ultrasound, liver and kidney function tests to determine the cause of the disease and to treat the cause of the disease, while furosemide, spironolactone, hydrochlorothiazide and other diuretics can be used to alleviate the symptoms. At the same time, patients with edema at night should drink less water, usually can carry out leg massage, can eat more red beans, winter melon and other foods to reduce swelling.