Drinking red people is the body lacks an enzyme to help metabolize ethanol, called acetaldehyde dehydrogenase. Alcohol is absorbed through the gastrointestinal tract, 90% of which is metabolized by the liver, where it is broken down and metabolized into acetaldehyde. When there is a lack of the enzyme acetaldehyde dehydrogenase, acetaldehyde will build up in the body, causing dilation of the skin’s capillaries, especially in the face, resulting in redness and dizziness. Even if there is enough acetaldehyde dehydrogenase in the body, when a large amount of alcohol is ingested, the body’s metabolism is incomplete, a large amount of acetaldehyde can not be metabolized in time, and the body will still have a buildup of acetaldehyde, which is also a side effect of intoxication. Drinking large amounts of alcohol will lead to reduced liver function, the body’s ability to metabolize ethanol decreases, aggravating liver damage. Try not to drink alcohol, or drink less alcohol.