4. Anorectal abscesses
It is the accumulation of pus in an infected cavity near the anus or rectum. According to its location, there are 4 types: 1) Supralevator abscess (it is the most common in cases of Crohn’s disease, it is located above the anus elevator). 2) Ischiorectal abscess (it is more profound and extends through the sphincter to the ischiorectal space, below the elevator of the anus). 3) Intersphincteric abscess and 4) perianal abscess (they are superficial, very close to the skin). Superficial abscesses are usually the most painful, while the deepest ones are sometimes painless; they only generate fever or malaise.