What are the causes of flatulence? Flatulence can have several natural causes, and may also be the consequence of a condition that affects the digestive system.
Intestinal gas consists of:
Exogenous sources - air that comes in from outside. We swallow it when we eat, drink or swallow saliva. It can occur when we experience nausea or acid reflux and excess saliva is produced.
Endogenous sources - it is produced within the gut. Gas may be produced as a by-product of digestion of certain foods, or when foods are not digested completely. Anything that causes food not to be digested completely by the stomach and/or small intestine can cause flatulence when it reaches the large intestine