Bacon and onion. Cut a slice of onion and seer in a hot skillet till almost' transparent, one side. Remove and set aside. Cut a square piece off of a slice of bacon and put in the still warm pan for only a few seconds on both sides. Take the middle rings out of the onion large enough for the boil you are trying to cover, put the bacon closet to your skin with the seared side of the onion behind the bacon piece, wrap with gauze and leave on for as long as you can (hours). Repeat several times till the boil starts to drain or the plug comes out. Works very well.