There are many causes of edema in the elderly, such as malnutrition, acute nephritis, nephrotic syndrome, cirrhosis of the liver, hypothyroidism, etc. Different causes lead to different medications, which should be used under the guidance of a doctor, and should be avoided on their own, to prevent delays in the condition, and the commonly used medications include furosemide, hydrochlorothiazide, and so on. If the elderly usually have a poor appetite, it is easy to lead to insufficient or unbalanced intake of nutrients, malnutrition, such as the lack of protein, which causes hypoproteinemia, the phenomenon of body swelling, it is recommended that the elderly eat more nutrient-rich foods to avoid nutritional deficiencies. If edema in the elderly is caused by acute nephritis, it is necessary to limit the intake of water and salt in mild edema; thiazide diuretics, such as hydrochlorothiazide, chlorothiazide, etc., can be used when there is obvious edema; and when edema is more serious, collaterals can be used as diuretics, such as furosemide and bumetanide. If edema in the elderly is caused by nephrotic syndrome, label diuretics (e.g. furosemide, bumetanide, etc.), thiazide diuretics (e.g. hydrochlorothiazide, chlorothiazide, etc.), and potassium-trapping diuretics (e.g. the aldosterone antagonist spironolactone, etc.) can be used to reduce edema. Diuretics such as hydrochlorothiazide and furosemide can be used if edema in the elderly is caused by cirrhosis. If edema is caused by hypothyroidism, thyroid hormone can be given for treatment. Edema in the elderly should not be arbitrary use of drugs, should be timely to the hospital to identify the cause of the disease, symptomatic treatment.