Devices blowing heated air onto the scalp have been tested for efficiency 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.

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).
Devices blowing heated air onto the scalp have been tested for efficiency 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.
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).
Treatment of human lice