What causes IBS to occur?

R/O IBS. IBS is a diagnosis of exclusion. CROHNS DZ/IBD is inflammation usually DX by BX IBS SX can be managed. You need a full exam and blood work. Especially screen for H pylori. Also stool screen x 3 for occult blood /parasite/ &colonoscopy./EGD While you are getting these items checked out you should stick to a gluten free diet. Ie gutbliss. Com and Wholeapproach. Com.
Multifactorial cause. Irritable bowel syndrome is the multifactorial consequence of hormonal, immune system and nervous system dysfunction resulting from genetic predispositions and dietary and environmental insults. The predominant symptoms like diarrhea cramps constipation are the result of autonomic nervous system instability. Pts like you may benefit from a metabolically directed approach.
Unknown. We dont know exactly, we think it s a faulty communication between nervous system and the bowells. Stress plays a significant role in this disease.