The sensation of abdominal bloating can come from intestinal distension and/or heightened sensitivity to this.
Excessive flatulence and belching can also suggest increased formation or reduced absorption/utilization of gas. Loud gurgling or rumbling noises in one's tummy (borborygmi) may mean the same.
A swollen belly without increase in one's body weight, suggests the same.
People with irritable bowel syndrome may complain of abdominal bloating worsening as the day goes on, especially after meals. This may be due to bacterial fermentation of carbohydrates, food intolerance reactions or possibly swallowing too much air (aerophagy.)
Considerable small intestinal malabsorption of carbohydrates can occur, even to the
extent that bacterial populations in the intestine are altered towards species which
thrive on this.
Eating easily digested food is often recommended, so nutrients can be absorbed closer to the start of the intestine, away from bacteria.
I generally get people to try digestive enzyme supplements instead of the above.If one is intolerant to particular foods, the more rapidly they are fully digested the less the probability of a bad reaction2.
"Our Golden Rule is this: If not comfortable in both mind and body from one meal to the next, miss the next meal. If you are worried, apprehensive, grieved, angry, jealous, depressed, irritable, grouchy, petulant, fearful, or otherwise mentally distressed, wait upon the recovery of poise before eating. This is as important as not eating when in pain or when there is fever. It is as important as not eating when fatigued. Good digestion depends upon emotional poise."
It will help the doctor if you know whether or not your weight has changed at the same time. Ascitic fluid can accumulate around the bowel, in which case one will have put on weight. "A pint of water weighs a pound and a quarter" - at least I seem to remember it did when I was at school.
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