The treatment of sudden ankle swelling in the elderly should be determined by the cause, such as chronic cardiac insufficiency caused by diuretics such as hydrochlorothiazide for treatment, chronic liver diseases such as cirrhosis need to be supplemented with protein, venous reflux disorders such as venous thrombosis of the lower extremities need anticoagulation therapy. 1. Chronic cardiac insufficiency: If chronic cardiac insufficiency caused by pulmonary heart disease leads to ankle swelling, diuretics such as hydrochlorothiazide and furosemide can be used to reduce swelling. 2. Chronic liver disease: such as cirrhosis of the liver to cause significant reduction in the synthesis of albumin can appear ankle edema, treatment in addition to the treatment of the primary disease and actively replenish the albumin, you can also use the above diuretics treatment. 3. Chronic kidney disease: such as hypertension, diabetes mellitus caused by nephropathy should actively treat the primary disease, oral antihypertensive drugs or hypoglycemic drugs, if the combination of proteinuria can choose angiotensin-converting enzyme inhibitors such as captopril, enalapril, and other drugs for protein-lowering treatment. The above mentioned diuretics can be used for obvious edema. 4. Venous return obstacles: such as lower extremity venous thrombosis can generally be improved by anticoagulants, such as warfarin and antiplatelet drugs such as aspirin and other drugs edema, the symptoms of severe cases need to be implanted through the filter or surgery to improve the symptoms. Sudden swelling of the ankles in the elderly may have other causes, symptoms should be timely to the hospital, improve the examination to determine the cause of the disease, under the guidance of the doctor standardized treatment. All of the above medications should be used appropriately under the guidance of a doctor to avoid adverse reactions.