గ్యాస్టిక్ సమస్యలు ఎలా వస్తాయి | Hi9 | Dr.T.Lakshmikanth | Med9 Hospital - Gas inside the abdomen is often said as bloating, belching, abdominal pain or flatulence all this actually a misnomer, gas inside the abdomen is caused by production of many of gases among them 4 important gases are H2, CO2, Oxygen and Methane this gases are in different quantities and different parts of the abdomen.