Abstract: A method and corresponding device and kit for treating a human nail may include applying to a surface of said nail distal to the bed of the nail an abrasive surface oscillating through a length in a plane substantially parallel to said nail surface at an area of application and urging the abrasive surface against the area of application with a force substantially normal to the nail surface at the area of application, wherein the urging force taken together with the extent of oscillation of the abrasive surface at the area of application is sufficient to abrade the material of the nail from said surface, but is substantially incapable of damaging living tissues from areas surrounding the nail.