• 
  

  • 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.