there is a great english cult film about a man with a carbuncle on his neck--
A Head for Advertizing
very funny, very strange.. it has some gross errors-- (film has been flipped for a reel, and everything is in mirror image-- and the set changes with in a scene-- continuity errors.) but its is a very funny "black" comedy.

I guess I would call it a boil-- (if it was something beyond a zit)