Fissure

A fissure is a small tear or wound inside the anal canal. It is caused by hard stool trauma to the anal skin. After healing it leaves behind a small nodule and it is known as a sentinel pile. It is associated with fissure. After every attack of the fissure, it enlarges and becomes a cause of worry for patients. The pain is not felt in this mass but it is inside the anus in a fissure.