Swollen eyes after drinking may be caused by alcohol stimulation, water retention caused by drinking too much alcohol, allergies and kidney disease. 1. Alcohol stimulation: Alcohol can speed up blood circulation and promote capillary expansion. When you drink alcohol, the alcohol in your body will cause the capillaries in your eyes to dilate and become congested, making your eyes look swollen, which is a normal physiological reaction after drinking alcohol. 2. Drinking too much alcohol causes water retention: after drinking, the human body will ingest a lot of water, water can not be metabolized through the kidneys within a short period of time, which will lead to water retention in the body, too much water will be gathered to some of the more lax location, such as the eyelids, the eyelids appear swollen performance. 3. Allergy: If eye swelling occurs after drinking a small amount of alcohol, it is possible that the patient is allergic to alcohol, accompanied by redness all over the body, itchy skin and other allergic symptoms. 4. Kidney disease: Kidneys have a very powerful excretory function, when the kidney function is damaged, the excretory function is abnormal, after drinking alcohol can’t be metabolized and discharged in time, eye swelling will occur. With kidney disease, it may also be accompanied by edema of the ankles and facial edema. Excessive alcohol consumption is harmful to the body, and patients are advised to avoid drinking alcohol as much as possible, and go to the hospital in time if any discomfort occurs in the process of drinking alcohol.