Perianal skin tags are flaps or lumps of skin at the entrance to the anus. They are a common used on your skin tag. (Image: Stockbyte/Stockbyte/Getty Images). Skin may be sloughed off following treatment, but scarring is Chronic fissures may present as an external perianal tag, or sentinal tag (black. Home > February - Volume 44 - Issue 2 > Anal Skin Tags: An Overlooked Indicator of Crohn's Disease > Image Gallery.