Leave it alone...
This is a poxvirus, 4 -subtypes (mcv1-4), and can be quite contagious.
.Lasting from 3wks to 2-3 months, but an outbreak can last to 18 months. They often resolve without treatment..Attempts at removal such as scraping/rubbing may actually spread the virus
more. Topical such as wart cream or 10% benzoyl peroxide
cream) can help. Cryotherapy
by your doc also can be tried...Good luck..