• • Parent’s or child’s desire for office-based treatment.

Relative

• • Child unable to undergo painful procedure.

  • Some physicians consider verruca in a periungual location a contraindication to destructive therapies (nail matrix damage may occur and result in permanent nail dystrophy).

  • History of keloidal scarring.

• • Dipstick method.

  • • Liquid nitrogen (–195.8 °C).

    • Cotton-tipped applicators.

    • Cotton balls.

    • Styrofoam cup.

    • Extra cotton can be rolled onto cotton-tipped applicators.

  • Spray devices

  • • Cryospray canister filled with liquid nitrogen.

    • Children may be afraid of these spray canisters and often have less anxiety with the dipstick method.

• • Treatment causes blistering and rarely scarring.

  • Temporary hyperpigmentation or hypopigmentation.

  • Hypertrophic or keloidal scarring is rare.