An uncomfortable feeling of being bloated in the abdomen as well as rumbling sounds in the intestines might result from excessive gas (or wind) in the digestive tract. These symptoms are typically relieved by gas expulsion through the mouth or anus. Even though it may be embarrassing, passing gas, rarely indicates a health problem. Most often, it results from swallowing air or from specific foods that the digestive juices are unable to fully break down, leaving a residue that ferments and produces as in the intestines. People react differently to different foods, though onions, cabbage, and beans are frequently the cause of gas.