Everyone has gas and eliminates it by burping or passing it through the rectum. However, many people think they have too much gas when they really have a normal amount. Most people produce about 1 to 4 pints a day and pass gas about 14 times a day.
Gas is made primarily of odorless vapors— carbon dioxide, oxygen, nitrogen, hydrogen, and sometimes methane. The unpleasant odor of flatulence, the gas that passes through the rectum, comes from bacteria in the large intestine that release small amount of gases containing sulfur.
Although having gas is common, it can be uncomfortable and embarrassing. Understanding causes, ways to reduce symptoms, and treatment will help most people find relief.