It’s not a procedure, just a fancy adjective for cysts to mean “in the butt crack, tailbone area”.

They could have just said “cyst removal” but I feel there is a bit of cheeky meaning to the fact that it’s specifically about a sore butt; alluding to “men get all the pain meds just for being butt hurt while women struggle to be taken seriously”

I’m also confused why the term wasn’t explained.