Blushing after drinking alcohol is due to the expansion of capillaries in the face after drinking alcohol, which increases the blood flow rate and increases the blood flow through the capillaries of the face, so blushing occurs. The mechanism of blushing after drinking alcohol is that after alcohol is absorbed by the body, it is dehydrogenated by ethanol dehydrogenase and turned into acetaldehyde. Acetaldehyde has the effect of dilating capillaries, and the capillaries in the face are already richer, and the blood flow carried by the expansion is more than the original. Another important factor is that the heart is stimulated by the action of alcohol and the heart rate is accelerated, the capillaries in the face are dilated and the blood flow is accelerated after the blood flow is increased, and the local redness of the face is actually a sign of congestion. Because excessive alcohol consumption is harmful to the body, it is recommended to drink less or not to drink as much as possible.