Leg swelling after drinking alcohol is generally considered to be caused by abnormal kidney function. The main function of the kidneys is metabolism, after drinking a lot of alcohol due to poor kidney metabolism will appear leg swelling phenomenon, in addition, some people because a lot of alcohol at the same time with a lot of water phenomenon, a short period of fluid intake too much, the kidneys can not be timely excretion will also appear leg and dorsal edema phenomenon, especially with lower limb venous thrombosis symptoms will be more obvious. In addition, lower extremity edema is also seen in patients with hypocardium and liver function abnormalities, and lower extremity edema due to poor cardiac function is usually seen after a lot of activities and can be relieved after night rest, which can be identified by heart ultrasound and left heart function measurement. Edema due to liver function is accompanied by abnormalities in digestive function, such as abdominal distension and poor appetite, and blood tests mostly indicate abnormal liver function. It is recommended that if lower limb edema occurs, rest should be paid attention to and alcohol consumption should be limited, and if the symptoms of lower limb edema occur repeatedly, the patient should go to the hospital for further examination of relevant indicators and targeted treatment.