Usually leave alone
often disappear on their own.
I frown on home treatment because I have seen the disasters cause by this. If one does not know what they are doing, harm can come. There are tendons and joints on the fingers and they can be harmed. See a doctor and get the warts either injected, frozen, chemically treated or even perhaps :"burned" or lasered off or other treatment. Dermatologist r the 1.