Elderly people with swollen calves may be caused by lower extremity venous thrombosis, renal insufficiency, superficial phlebitis of the lower extremities, etc., and the patient should consult a doctor in a timely manner to clarify the cause of the disease. 1. Lower extremity venous thrombosis: the elderly calf swelling and itching may be caused by lower extremity venous thrombosis, most common in long-term bedridden elderly patients, there will be pain on the affected side of the limb, skin temperature increases, should be braked, timely to the regular hospital color Doppler examination, and under the guidance of the doctor for appropriate treatment. 2. Renal insufficiency: when the elderly have renal insufficiency, due to sodium retention and accumulation of toxins, there will be swelling and itching of the lower legs, and there will be high blood pressure, decreased urine output and other symptoms, and dialysis treatment if necessary. 3. Superficial phlebitis of the lower extremities: Swelling of the legs of the elderly may also be caused by superficial phlebitis of the lower extremities, the patient will also have pain in the limbs, redness, along the route of the affected veins can be detected with pressure and pain in the stripes. Elderly people with swollen calves, if the symptoms persist, it is recommended to consult a doctor for a clear diagnosis.