The reason for foot swelling is due to edema in the lower limbs. Because edema flows to the lower part of the body after a day’s activity, it appears in the afternoon, and the earliest place is in the ankle joint and the calf area, in front of the shin. If the condition worsens later, it can lead to edema, swelling and pain in the entire lower leg, so the cause of the disease needs to be clarified before treatment. If the condition is caused by low protein, it is necessary to supplement albumin, and when albumin is corrected to normal, the edema can subside; if it is caused by cardiac insufficiency, hypertension, coronary heart disease, etc., the patient’s central venous pressure is very high, and the blood return to the lower extremities is impaired, which results in foot swelling, and oral antihypertensive drugs and symptomatic treatment are needed; if it is caused by renal insufficiency, it can also manifest If it is caused by renal insufficiency, it can also manifest as foot swelling in the afternoon, and some symptomatic drugs are needed to correct the kidney function of the patient.