My mother has had an ileostomy. she has previously been on tpn and now has a low fibre diet. she has been having spasm like pain since eating. why?

Slow progress. diet: Your dietary tolerances will depend on how much healthy small intestine remains and time since surgery. First few wks. post surgery Start low roughage diet.Eat slowly ,on time , no skipping meals. Add Gatorade/Powerade are hydrating and helpful after surgery. Avoid constipation. If stools thick, Stool-thinning foods may include grape juice, orange juice. Add Probiotics. Avoid gaseous F