Alcohol is also called ethanol, ethanol is not a carcinogen, but its metabolites can cause cancer, because the main substance produced by the metabolism of ethanol is acetaldehyde, which is carcinogenic. Alcohol is the common name for ethanol, which is colorless, transparent, volatile, and stimulating. After drinking alcohol, ethanol is broken down by enzymes in the intestines, producing the metabolite acetaldehyde, which studies have pointed out has the risk of causing cancer, so alcohol is carcinogenic. Due to genetic factors, most Asians can maintain a higher concentration of acetaldehyde, a metabolite of alcohol, in the body for a longer period of time after drinking alcohol, which can enhance its carcinogenicity. Moreover, alcohol as a solvent can promote the absorption of other carcinogens in the body, enhancing their carcinogenic effects, such as nitrosamine compounds, vinyl chloride and so on. It should be noted that the occurrence of cancer is related to many factors, in addition to avoiding alcohol, for the sake of health, it is recommended that patients maintain a good lifestyle, which is conducive to reducing the incidence of cancer, such as non-smoking, eating a light diet, appropriate physical exercise, no contact with toxic and harmful substances, work and rest, and maintain an optimistic and positive mood.