Abstract: Pliers are disclosed for the treatment of ingrowing nails on the human body. The pliers comprise first and second jaws. The upper jaw has a support member on which there is mounted an electrical heating wire. A slot in the lower jaw is adapted to receive the support member and wire.In use, the pliers grip are ingrowing toe nail, and an electric heating current is applied to the wire, to cause local heating of the nail. The nail thus softens, and can be bent back into better shape, which shape is retained upon subsequent cooling of the nail. The lower jaw is of a relatively great heat mass, so as to ensure that no undue heating of the nail plate occurs. Control circuitry is provided for controlling the heating current through the heating wire, optionally in dependence upon a detected temperature.