Hi
Welcome to the forum!
If celiac, Crohn’s and other problems have been ruled out then lactose intolerance and IBS are the possibilities. Gas in stomach, burping, diarrhea all go in favor of IBS. Pancreatic enzyme disorders, liver dysfunction, HIV, cancer of the gut, and infections by parasites other than giardia can all cause persisting diarrhea. Please discuss this with your doctor (your father’s GI doctor).
Hope this helps. Please let me know if there is any thing else and do keep me posted. Take care!
I too have been kind of struggling with this. Do you have anxiety? Anxiety can cause these issues and an imbalance in the stomach... as the stomach also creates serotonin.
Do some foods go right through you faster than others? Or does it just depend on the day? Does milk bother you?
Do you ever get any lower flank pain? Like pain in the left or right lower side of your abdomen?
My Dr. said I have a minor spell of IBS.... but I hope thats all it is.
Good luck with you. Hang in there.
I also get my only releif from the stomach pain by burping very manly burps