what causes gas on the stomach and pain
Flatulence, or gas, is actually a normal bodily function and, in fact, it is quite healthy. Flatulence is the by-product of digestion, although when cancer treatment causes severe flatulence and/or lower abdominal pain, measures can be taken to minimize the treatment's effects.
Gas forms when bacteria in your colon ferment carbohydrates that aren't digested in your small intestine. Unfortunately, healthy, high-fiber foods are often the worst offenders. Fiber has many health benefits, including keeping your digestive tract in good working order and regulating blood sugar and cholesterol levels. But fiber can also lead to the formation of gas. High-fiber foods that commonly cause gas and gas pains include: