When your belly feels swollen after eating it is bloating. Gas or other digestive issues can cause your stomach to bloat. There are a few foods which can cause bloating that you have got to avoid eating. Lentils: They are loaded with protein fibre and healthy carbs and minerals like iron copper and manganese. One may suffer from bloating due to the high fibre present in it. Carbonated drinks: They contain a very high amount of carbon dioxide and gas. You can swallow a large amount of gas if you drink these beverages. Moreover the gas can also get trapped in your