Flatulence, Diarrhea and Abdominal Pain
The digestive process of lactose in the large intestine causes the accumulation of gas in the stomach, also known as flatulence. This condition causes you to frequently pass intestinal wind from the anus (farting).
Breaking down lactose in the colon causes the accumulation of various fatty acids, gases, and water. It irritates the digestive system and can cause frequent stooling. There is a significant increase in the volume of water in the colon, which causes loose stools.
Due to the inability of the small intestine to break down lactose, the body moves it into the large intestine (colon). Here, the bacteria ferment with the sugar, breaking it down into fatty acids, water, and gases like carbon dioxide, methane, and hydrogen. This reaction causes discomfort, usually in the lower belly.