Check out this link... the first set of pics is of hemmies the pic below that is of perianal crohn's skin tags (aka; elephant ears) these are not the same as hemmies nor should they be treated the same...talking form experiance and everything I've been told and read after the fact.
http://www.emedmag.com/html/pre/fea/features/011504.asp
I have these anal tags too and they were misDX as being hemmies and I had them banded (while they were in a flare) and they've remained in a flare and never shrunk down (which they can sometimes on their own or with rectal meds, ask your GI about it, don't be embarassed)...I've had them remain in a constant flare for the just over 19 yrs that I've now had this DD....my crohn's actually started with these perianal crohn's skin tags then moved internally (affecting my TI, colon and rectom all at one time).
These perianal crohn's skin tags can happen to any crohnie, they are rare kinda and their more common for crohnies that have their colon/rectoms involved....they can come and go on their own but some rectal meds might help shrink them back down, they're considered part of the nature of the beast of having crohn's, just like how some CDers are prone to blockages/stricturs, fistulas, ect.