Anal fissure

Name(s): 
Anal fistula
Nature

An anal fissure is a break or tear in the skin of the anal canal. Anal fissures may be noticed by bright red anal bleeding on toilet paper and undergarments, or sometimes in the toilet. If acute they are painful after defecation, but with chronic fissures, pain intensity often reduces.

Source: Wikipedia

Type 
(G) Very specific problems