most helpful answer the heating pad did not cause your diarrhea but the pain you were experiencing most likely is related. many people will experience intestinal cramps prior to the onset of diarrhea.
used a heating pad on my stomach for pain. the next day i had very sudden diarrhea. coincidence or not? . i never before used a heating pad on my stomach. it was a low setting. today i had one sharp cramp then diarrhea. since then i've been okay.