The gas builds up when food begins to break down and when we swallow air. For some, bloating is more than just a swollen abdomen. Other symptoms include frequent burping or belching, painful or hard abdomen and rumbling and gurgling noises. Avoid swallowing excess air. This means limit the amount of gum you chew, drinking from straws and carbonated beverages. Also, choose less “gassy” and high sodium foods.