I've been using Kratom for more than 5 years to help control my IBS-D.
Kratom does constipate you if you use too much. So if you were to try this I would recommend starting small. Kratom will help with pain and discomfort as well and will give you a feel good effect for a little while. Some say it's addictive and it might be. When I stopped taking it for 8 month my only issue was, it was harder for me to fall asleep and stay asleep.
DO YOUR RESEARCH ON KRATOM, ITS NOT FOR EVERYONE.