Treating a verrucha painlessly

To treat a verrucha without it hurting, marinade some orange skin in some vinegar overnight.
After it's marinaded, cut a piece as big as your verrucha. Make sure it's no bigger otherwise it will wrinkle the skin around the verrucha.
Put it on your verrucha overnight, keeping it in place with a plaster or tape. Change it every day. After a few days, it will start fading away.