Hi. Thanks for your query. Noted the history and understood your concerns. Passing motion twice a day, pain in abdomen on drinking water half an hour after food with formation of gases may be related to one of the following: - IBS that is irritable bowel syndrome. - Can be due to aerophagia as you may be eating in a hurry thereby swallowing air and the water increasing the volume so that the gases and pain starts. I would advise you the following in such a situation: Get an X-ray of the abdomen in standing position when you are in pain so that we can see whether there is gas-fluid levels suggestive of an intestinal obstruction. Ultrasonography to see if there is any problem with gall bladder, liver or pancreas. Clinical evaluation and examination to see the clinical cause and to decide the diagnosis along with the tests of blood, urine and stool to have a plan of management. In the meantime, change the timing of foods and water intake, go for small frequent meals, eat slow and see the results.