A professional flash freezing or laser removal. Research wart removal techniques.
You will need to see a Dr. and be tested anyway to find out what type of the virus yours is and get preventative treatment if available for your type.
Are you that lonely you can't google this chit? The cheapest and least painful way is to tie a piece of fine string around it, pull it tight, snip the ends and wait. It will eventually turn black from the lack of blood and fall off on its own.
My wife had one at one time and she hated it. She tried everything to get rid of it, short of surgery. Then she found this elixir on pinterest or some **** like it. She used apply vinegar cider and dabbed it on. It got really ugly then a week or two later it fell off never to return. Damn i'm glad that thing is gone...yuck!!