Many people think the bloated feeling after eating is caused by large amounts of gas. Researchers, however, have not found any connection between this symptom and the total amount of gas in the abdomen. Gas in the upper abdomen often is relieved by belching. Sometimes people try to swallow air to make themselves belch. This doesn't work, however, because it only adds to the amount of gas in the stomach and does not reduce the discomfort.
Gas can collect anywhere in the lower intestine.
Often it collects on the left side of the colon, and the pain can be confused with heart disease. When gas collects on the right side of the colon, the pain can be like that caused by gallbladder disease or even appendicitis. A bloated feeling is probably not anything to be concerned about, but it can be a symptom of a more serious problem, such as an intestinal obstruction. If your problem is chronic, or if you are experiencing a severe increase in gassiness, you should talk to your doctor. If excess gas is your only symptom, it is probably not caused by a disease.