Flatulence: Flatulence, also known as gas/wind, is the accumulation of gas in the digestive tract. It could occur due to aerophagia (air swallowing), functional dyspepsia (indigestion), peptic ulcer, irritable bowel syndrome, infant colic, or post-operative gaseous distention. Symptoms include a sensation of pressure in the abdomen, bloating, fullness, and intestinal spasms.