Alcohol can irritate the digestive system and change how the body absorbs fluids. It may change the regularity of a person's bowel movements and could result in either diarrhea or constipation.

Why does alcohol upset my bowels?

When alcohol is present, the large intestine does not function as well. This can result in liquid stools and dehydration. Faster digestion: Alcohol agitates the intestines and causes them to react by speeding up digestion. The muscles in the colon contract more frequently, pushing stool out faster than usual.

Does alcohol mess up your digestive system?

A single heavy episode of drinking can damage the mucous cells in the stomach, and induce inflammation and lesions. High alcohol content beverages (more than 15% alcohol volume) can delay stomach emptying, which can result in bacterial degradation of the food, and cause abdominal discomfort.