• Flatulence is produced by the stomach's gastrointestinal tract.pregnant female with yellow flower on the dark image by Pavel_A from Fotolia.com
  
  The term "flatulence" refers to the passing of intestinal gas through the anus. While swallowing air causes a small amount of flatulence, the majority of flatulence is caused by the production of intestinal bacteria after certain foods are consumed. Foods commonly associated with flatulence include sugars, starches and some fruits and vegetables such beans, legumes and green leafy vegetables. In addition, a small percentage of flatulence is caused by anal conditions such as irritable bowel syndrome and by some diseases such as colon cancer, stomach cancer and cystic fibrosis.
  
  

Starch-Related Flatulence

• Consuming high-fiber foods can often cause flatulence.Pearl barley on the big wooden spoon image by Elzbieta Sekowska from Fotolia.com
  
  Perhaps the most common source of flatulence is the consumption of starches such as rice, wheat, whole grains, and fruits and vegetables that contain cellulose or excess fiber. Because the body can only absorb a certain amount of fiber, excess fiber is converted into flatulence and feces and expelled from the anus. Foods that are particularly high in fiber -- such as whole grains, green leafy vegetables, oats, potatoes, and brown rice -- should be limited or avoided if you suffer from excess flatulence. Similarly, foods that contain cellulose should be limited or avoided, as the colon and intestines absorb cellulose slowly, causing flatulence during the absorption process.
  
  

Sugar-Related Flatulence

• Some sugars, such as lactose, also cause flatulence.Milk, milk and hands image by Mykola Velychko from Fotolia.com
  
  Because sugars such as lactose, fructose and sorbitol are often poorly digested or malabsorbed, they can often cause flatulence. Persons who suffer from severe flatulence should avoid foods and drinks containing these types of sugars, including milk, low-calorie sweeteners and some fruit drinks.
  
  

Irritable Bowel Syndrome and Flatulence

• Irritable bowel syndrome is a condition that impairs the natural function of the gastrointestinal tract, resulting in excess flatulence and often the inability to control the bowels. The cause of IBS is the occurrence of uncoordinated muscle contractions, sometimes due to intestinal infections. IBS-related flatulence is highly odorous and can be accompanied by small amounts of feces. IBS is typically treated with a combination of diet and anti-diarrheal drug therapy.
  
  

Flatulence and Disease

• Any type of disease that impairs the natural function of the intestines can cause flatulence. For example, colon cancer, which affects the large intestine, is often diagnosed by changes in bowel movements, abdominal discomfort, flatulence and rectal bleeding. If you experience any of these symptoms on a regular basis, including passing gas more than 14 times daily, consult a physician immediately.