Whats the difference between head lice and nits?
Head lice are the insects themselves, while nits are the egg cases of head lice that have hatched. Nits remain stuck to the hair shaft until the hair grows out or they are physically removed. Nits can be found for weeks or months even after the head lice themselves have all been cleared. Their presence does not necessarily mean you have head lice; you can only be sure you have head lice if you can find living, moving lice. Never treat for nits unless you can find living lice.
