Frequently Asked Questions (FAQ's)
Question: What causes allergic reactions after bowel movements?
Answer: In my case, it was a food allergy (turned out to be GMO foods). I have come to believe that the lining of the rectum is more permeable to substances than the rest of the digestive tract and the bowel movement increases this effect. Try an "elimination diet", keep a detailed food diary for awhile, and most important, avoid processed foods. - 260