Leg swelling in liver cirrhosis may be related to venous thrombosis, hypoproteinemia, hepatorenal syndrome and other reasons. 1. Venous thrombosis: as cirrhosis patients will have high coagulation of blood, resulting in venous thrombosis causing blood stagnation in the legs, blood return obstruction and leg swelling. 2. Hypoproteinemia: the liver synthesis function of patients with cirrhosis decreases, and with the decrease of albumin level, hypoproteinemia occurs. 3. Hepatorenal syndrome: patients with cirrhosis are prone to complications of hepatorenal syndrome in the late stage, which leads to water and sodium retention, resulting in swelling of the legs and other symptoms. If the symptoms of cirrhosis are not relieved or accompanied by other symptoms, the patient should go to the hospital in time, and the cause should be clarified and targeted treatment should be given.