About 95% of the alcohol ingested into the body has to be metabolized by the liver, and the metabolism process relies on the enzymes ethanol dehydrogenase and acetaldehyde dehydrogenase, which, if active enough in the body, can quickly break down the alcohol into non-toxic, harmless carbon dioxide and water. The redness of the skin and conjunctiva after drinking alcohol comes from the product of alcohol decomposition called acetaldehyde. If the body lacks the enzyme acetaldehyde dehydrogenase, the acetaldehyde produced by the decomposition of ethanol can not be broken down by the enzyme acetaldehyde dehydrogenase and accumulates in the body, which will soon cause vasodilation, manifesting itself as a generalized reddening of the skin, especially on the face and the conjunctiva. Acetaldehyde is a harmful substance that accumulates in the body, damages organs, destroys DNA, and may even cause cancer. If you are a person who blushes and has red skin all over your body after drinking alcohol, I hope you will try not to drink alcohol again in the future.