Mucosal defect – a wound – located on the back of the anal canal, just above the anus.
It is characterized by extremely severe pain, like burning, during and after defecation, with scanty bleeding on toilet paper. It feels like a knot when touched, a lump, painful to the touch.
It is caused by too strong tonus of the internal sphincter of the anus, which tightens and stretches the delicate mucous membrane, which bursts and creates a defect. It usually occurs due to hard stools and difficult defecation; or, after episodes of frequent sparse stools.