7 Unexpected Signs of Stress
Why it could be stress: Things may stop moving because your body is diverting energy to more essential organs and systems to help you survive, says David Spiegel, MD, director of the Center on Stress and Health at Stanford School of Medicine. And research suggests that diarrhea may be triggered by the gut's response to a chemical called CRF that the brain releases under stress (your colon is full of CRF receptors).
Other possible causes: Backups can develop from too little fiber (women 50 and younger need 25 grams per day; 51 and up need 21 grams). As for diarrhea, non-stress-related causes include stomach viruses, contaminated food and certain medications. You could also be eating foods that just don't sit well in your stomach, like these 6 items that many people have trouble digesting.