Ya. This is a problem, and a I have a few theories. First, the obvious; the candida is active, and being close to many nerve endings after a bowel movement it is irritating. Second, you are not fully digesting food, due to dysbiosis and this causes small debris to cause irritation, especially when walking. Third, if it is parasitic [which candida sufferers are susceptible to] then you would have diarrhea a lot and the itch would be near unbearable.------------shroom