My anus is itching badly and is sore after a bowel movement. Looking at it closely it looks like there is a bump on the inside. I thought that it was a hemoriod but it is discolored sort of yellow. It almost looks like a mouth sore. Before you ask, no I m not homosexual, have not had anal sex. I m a married man that doesn t mess around. The bump is firm. I m worried that it is a polyp or some complication from a fissure .