Because acetaldehyde is harmful to the body, normal people will quickly convert alcohol into safer acetic acid after drinking, but people who drink "noodles" will not convert acetaldehyde into acetic acid so quickly.
If acetaldehyde is not decomposed quickly enough in the body, it will not only cause nausea and vomiting, but also cause telangiectasia, that is, blushing after drinking, and more seriously, it will kill liver cells. Therefore, if long-term drinking causes the liver to be stimulated by acetaldehyde, it will easily lead to cirrhosis and even liver cancer.
In addition, many people think that blushing after drinking is an allergic reaction and will continue to drink while taking anti-allergic drugs. However, studies have shown that ignoring the symptoms of blushing after drinking and only taking medicine instead of drinking will increase the incidence of esophageal cancer.
It should be emphasized that blushing during drinking is not directly related to the level of drinking. Because drinking is the human body's tolerance to alcohol, and this tolerance can be enhanced to some extent through exercise. However, drinking on the face is a hint of the defect of acetaldehyde metabolism in human body, which has little to do with drinking.