Pain around your butt
According to the Mayo Clinic, people with Crohn’s disease may have severe ulcers that can make tunnels through their intestinal walls – creating an abnormal opening (fistula) between different parts of the body. They are most common near or around the anal region, although they may also occur between the intestines and skin or intestines and another organ. As you might imagine, an abnormal opening can be horribly painful, no matter how it happens. So, if you develop a fistula around your bottom, you may experience intense pain and burning while sitting.