Caring for a Torn Nail.

Tearing a nail can be very painful. To treat a torn nail, the University of Wisconsin suggests the following: trim or file any sharp edges and trim off the detached part of a large tear, soak your finger or toe in cold water for 20 minutes after trimming, and apply a thin layer of petroleum jelly and cover the area with a nonstick bandage.

University of Wisconsin, August 2019