Diabetic patients with lower limb edema should control the blood sugar, diuretic swelling and protect kidney function, mainly through lifestyle changes and medication. When diabetic patients have lower limb edema, they need to control their blood glucose within a reasonable range, and take glucose-lowering drugs such as metformin tablets and glibenclamide tablets regularly under the guidance of a doctor. Patients should also adhere to a low-salt, low-fat, low-sugar diet. If diabetic patients develop diabetic nephropathy, it may also cause lower limb edema, which can be treated accordingly. If necessary, diuretics can be used to reduce edema, such as furosemide, spironolactone, hydrochlorothiazide and so on. Patients should not take medication on their own, and it is recommended that patients go to the hospital in time and be treated under the guidance of the doctor.