If you've ever had to unbutton your pants due to a swollen stomach or trapped gas ... Food intolerances can cause gas and water stools, which can result in bloating. Lactose intolerance ...

Viral gastroenteritis (stomach flu) causes intestinal irritation that may lead to generalized stomach cramps, diarrhea, and vomiting. Symptoms of constipation include lower abdominal or back cramping, ...

Additional constipation symptoms include difficulty passing stool ... The pressure, swelling, and gas can stimulate pain ...