Shoulder pain on the 2nd day after drinking, there are usually the following reasons: 1. The common reasons are muscle stretching and impact after drinking, because people will quickly enter 3 periods after drinking, which are the euphoria period, ataxia period and coma sleep period. In the ataxia department, the human brain under the action of alcohol usually occurs euphoria, consciousness or even a transient trance, at this time is particularly susceptible to trauma, the muscles are susceptible to impact and stretching. If the second day of shoulder pain is trauma and cause to come, local rubbing futalin can be. 2, the second day after drinking shoulder pain is too much lactic acid accumulation of soreness, through the exclusion of alcohol accumulation can also be alleviated, usually because of excessive alcohol in the conversion of ethanol into acetaldehyde, acetaldehyde in the decomposition of the release of acetic acid and lactic acid, in the body, too much acid accumulation, will also appear shoulder pain. 3, such as Shoulder pain is left shoulder, you need to check the heart function to see if acute heart dysfunction caused by excessive alcohol consumption, or acute myocardial ischemia induces pain radiating from the left shoulder.