Aug 16, 2018 · Itchy Rectum and Anus – Causes and Treatment. Posted by Jan Modric. About the Anus and Rectum. The anal canal is the last 2 to 4 cm (approximately 1 to 2 in) part of the large intestine that ends with the anal opening (anus). The rectum is about 12 cm (approximately 4 to 5 in) long and lies between the sigmoid colon and anal canal. Jan 24, 2019 · An itchy bottom can be caused by irritating chemicals in the foods we eat, such as are found in spices, hot sauces, and peppers. Anal itching also can be caused by the irritation of continuous moisture in the anus from frequent liquid stools, diarrhea, or escape of small amounts of stool (incontinence or fecal soilage).
While it's not known exactly why, one possible theory is that they can decrease the muscle tone of your sphincter, causing a little bit of fecal leakage, which then irritates the skin, Muldoon says. Yikes. The fix: To find out which item, if any, might be causing your itchy butt, you may need to go through a process of elimination. Remove one Author: Tamekia Reece.