The second day after drinking alcohol muscle soreness, the common reasons are the following two points: First, after drinking alcohol systemic vasodilation, blood flow speed up, alcohol metabolism will lead to an increase in body temperature, these factors will make muscle tissue metabolism increased, producing a large number of acidic metabolites, stimulating the muscle nerve endings, and cause pain symptoms, the day of drinking alcohol will not appear soreness symptoms, because alcohol at the same time there is a mild anesthetic effect, so the day will not have soreness perception, the next day will appear muscle soreness symptoms. The reason why there is no soreness on the day of drinking is that alcohol has a mild anesthetic effect, so there will be no soreness on the day, and muscle pain will only appear the next day. Secondly, after drinking alcohol, you will choose to rest on the same day, and will not exercise, as a result, the acidic metabolites in the muscle can not be eliminated in time, so it will continue to stimulate the nerves on the next day, resulting in soreness symptoms.