Can anxiety and worrying cause chronic abdominal pain, diarrhea, very smelly poo and lots of undigested food inside the poo?

Start it going?: Anxiety can play a big role in getting this sort of thing kicked off. It leads to a flood of chemicals that hit all your organs, esp the weaker ones. Breathing, circulation, gut symptoms are common. The chemicals are the cause, but anxiety sparks them off. See a Dr for the gut. Ask for a CBT referral to learn Anx Mgmt. You may get a short round of Anx Meds.