Infection of the anal sac to form an abscess, may occur following [[Anal Sacculitis|Anal Sacculitis]] or [[Anal Sac Impaction|Anal Sac Impaction]]. Fistulous tracts may arise from the abscess and rupture to the skin. | Infection of the anal sac to form an abscess, may occur following [[Anal Sacculitis|Anal Sacculitis]] or [[Anal Sac Impaction|Anal Sac Impaction]]. Fistulous tracts may arise from the abscess and rupture to the skin. |