Hello there, I am dr.milan an infectious disease specialist answering your question. Hope i have given appropriate guidance to you. I think you have loss of some of your intestinal flora, that is beneficial bacterial organism found in our intestine and you have some damage of intestine in form of small small many ulcers. So til this ulcer got heal you may have some pain in your abdomen. And for bacterial flora you take some probiotic food it will replace your flora to normal one. For some period take care you dnt eat spicy food. if you have any query you can consult me anytime. Give me star rating, helpful vote & thank you according to your satisfaction level. Thanking you.