In elderly people with swollen calves, first of all, color ultrasound examination of the veins of the lower limbs should be performed, preferably three-dimensional ultrasound examination, except for those caused by deep vein thrombosis of the lower limbs, because the elderly are less active and often bedridden, which easily leads to blood stagnation and is the cause of thrombosis. After the diagnosis is confirmed by ultrasound examination, anticoagulation therapy should be chosen if there is no contraindication, and low molecular heparin calcium subcutaneous injection should be applied and given twice a day. Further cardiac ultrasound and urological ultrasound should be performed, because some patients with cardiac insufficiency and right heart failure may also lead to stasis of the body circulation and swelling of the distal extremities, and the patient may also have symptoms of low urination, and should be treated with cardiotonic and diuretic drugs.