Swollen feet after drinking are commonly caused by vasodilatation, as well as aggravation of existing diseases, as follows: First, vasodilatation: drinking alcohol will cause vasodilatation throughout the body, including the blood vessels of the lower limbs, and blood in the veins will increase, resulting in short-term swelling symptoms in the feet. Elevating the affected limb and drinking a lot of water to promote urination and reduce alcohol stimulation can normalize the diameter of blood vessels, and the swelling of the foot will disappear completely. Second, aggravate the original disease: patients suffering from serious medical diseases, such as renal insufficiency and cardiac insufficiency, drinking alcohol will aggravate the lesion and cause severe bruising in the lower limbs, resulting in swelling of the feet. At the same time, there will be lesions in the primary site, such as chest tightness, shortness of breath, and panic, as well as pain in the lower back. The symptoms of swollen legs and feet can be completely relieved by treating the primary pathology. Usually, you should also pay attention to protect your body and avoid excessive alcohol consumption, otherwise it may have serious adverse consequences.