We have many parents nearly at breaking point when they visit our clinic due to being told by other parents, school staff, and even some hairdressers that their child STILL has head lice after they have treated at home because they can see white eggs visible in the hair. Please note that if you have treated the hair as instructed, twice, and not found any signs of crawling, live head lice, the chances are the hair is lice free. The white eggs are called nits and are empty shells; they are entirely harmless, and NOT contagious. Of course, it goes without saying if you have not treated or combed the hair, then there will be a live infestation. These eggs will have hatched and will go on to become adults that will mate and then lay more eggs.
It is only the adult female head louse that will transfer to another person's head. Having mated once, they can lay up to one hundred eggs before they die. If the hair is left untreated for just one month, you could have over a thousand eggs in the hair. Early detection is vital by combing and checking the hair once a week after washing hair.
If one family member has lice, then the whole family must be checked as head lice spread via hair to hair contact. Which means close, loving families that hug and cuddle up, are very likely to have head lice.
Another essential thing to do is it to advise friends that have been in close contact, so they are also aware they need to check. Letting your school know may be embarrassing, but it is good for them to be alerted so they can send a letter home to parents to make them aware. If you don't make others aware, there is more chance you will find yourselves host to these blood-sucking critters soon again.