Colicky/bloated pain ulq, can pinpoint it sometimes. comes and goes. loose stool x10 days, foul smelling. some nausea. abd xray, u/s normal. blood work normal. colon cancer? 25y f. no family history.

IBS: Based on the symptoms you are describing, you most likely have irritable bowel syndrome. This can cause alternating diarrhea and constipation with symptoms of bloating and gassiness. You should see your doctor for more information.

See GI doc. ? IBS: You need to have stool cultures for ova and parasites and a colonoscopy to look for other causes of diarrhea. Cultures and tests should be run for food poisoning and if it is real foul smelling i would think of clostridium difficile, especially if you have recently been in a hospital or nursing home or been on antibiotics. If you drank well or ground water, then giardia lamblia is a possibility.

Very unlikely: Although not impossible , colon cancer at 25 is very uncommon , in particular without family history . Colon cancer at 25 is almost always a genetic condition . Your symptoms are rather suggestive of bowel infection.