You have some burning feeling and feel that the butt hole has become small. This sensation could be due to two factors, one could be a local. My 5yr old son is complaining of pain in the -hole area. says its on the First, he might have torn a little fissure, or crack, in his anus that is sore. For anal in particular, it can be helpful to start with a small anal sex toy to use on your own, says Russel Stambaugh, Ph.D, an AASECT-certified.