The first reason is that when alcohol enters the body, the body needs to consume a lot of sugar to break down the alcohol for energy supply, and alcohol can stimulate insulin secretion, which also consumes a lot of sugar, thus consuming a lot of the body’s energy, resulting in insufficient heat production and even hypoglycemia, resulting in chills. Secondly, alcohol can inhibit the central nervous system, leading to a decrease in the body’s metabolic rate, which can also lead to a lack of heat production and cause chills. It is advisable to keep warm after drinking alcohol and to drink moderately.