Hi Renee,
I chew gum once in a while and it doesn't bother me, but that's the main thing "DO NOT SWALLOW IT". The nurse said it'll block your openings and will have to be removed.
Connie
I thought there was also something to do with the gum kind of tricking your stomach into thinking food is coming and it produces more digestive juices or something and the juices are kind of hard on the stomach if no food is in it. I think something like that! Hope that helps!