What else could be causing this lower abdominal tightness/stretching?

yea...that's crazy, I had a burrito once that was filled with rotten meat and corn. that thing gave me the worst, most dreaded, horrible, loud, watery, and hot traveling diarrhea. the worst part is, it all happened while I was staying at my mother in law's house and her dog kept barking and sniffing my bottom. it wasn't my fault that my chone's were steaming brown rancid fumes, after all it was her burrito because when it came out i saw the corn.