A person may experience gas in the stomach as a result of swallowing air, and due to breakdown of food. This is a common condition that all people experience, but it may cause an embarrassing and uncomfortable situation in public.
This gas is eliminated from the body through the rectum or through burping. There are some foods that can increase the amount of gas in the stomach, including carbonated drinks, lactose, starches, fructose and soluble fiber. There are different examinations that a doctor can conduct to determine the cause, should it be necessary for a person to seek medical attention. A change of diet can prevent gas bubbles, along with reducing the amount of swallowed air and using medications, as stated by Johns Hopkins Medicine.