Flatulence, also known as farting, is the act of passing intestinal gas from the anus. Flatulence is passing gas from the digestive system out of the back passage. It’s more commonly known as “passing wind”, or “farting”.
The source of excessive gas is intestinal bacteria. The bacteria produce the gas (primarily hydrogen and/or methane) when they digest foods, primarily sugars and nondigestible polysaccharides (for example, starch, cellulose), that have not been digested during passage through the small intestine. The bacteria also produce carbon dioxide, but the carbon dioxide is so rapidly absorbed from the intestine that very little passes in flatus.
Your diet or even a health problem can lead to problems with excessive gas.