<P> If no living lice are found, the treatment was successful, even if nits / eggs are visible on the hair . If living lice are still present, repeat the treatment using an anti-louse product with a different active ingredient . Prophylactic treatment with pediculicides is not recommended . Itching may persist for up to a week after head lice eradication . </P> <P> Devices blowing heated air onto the scalp have been tested for efficacy in killing lice and eggs and show up to 99% mortality of eggs and 88% mortality of hatched lice . The louse loses body moisture to the heated air and within the treatment period becomes desiccated and dies . Currently, there is only one FDA approved medical device that offers this technology . </P> <P> A standard home blow dryer will kill 96.7% of eggs with proper technique . To be effective, the blow dryer must be used repeatedly (every 1 to 7 days since eggs hatch in 7 to 10 days) until the natural life cycle of the lice is over (about 4 weeks). </P> <P> A special fine - toothed comb that can pick out lice is used . For a treatment with louse comb alone, it is recommended to comb the hair for an hour to an hour and a half (depending the length and type of the hair) daily or every second day for 14 days . Wetting the hair especially with water and shampoo or conditioner will facilitate the combing and the removal of lice, eggs and nits . </P>

Can you kill lice eggs with a blow dryer