Gas can occur due to the foods that you eat or because you take in too much air while eating. There are a number of foods that can increase gas, bloating, and flatulence, and each one may affect every individual differently. Common gas triggers include dairy products, certain sugars, and artificial sweeteners, such as sorbitol.
Some flatulence is normal, but excessive farting is often a sign that the body is reacting strongly to certain foods. This can indicate a food intolerance or that a person has a digestive system disorder, such as irritable bowel syndrome.