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Thanks for this question.
It is generally because the eggs are not removed fully
I would use permethrin.
it is the eggs
Hi! Per Nix (a permethrin treatment for lice), these are the reasons for reinfestation:" Reinfestation — or getting lice again after already being treated for it — is a real concern. No one is immune to head lice. If lice treatment is not followed properly, personal belongings such as hats or brushes are shared, or steps aren’t taken to rid your home of lice, they can come back and your child can get infested again."
I highly recommend using Nix shampoo because, unlike other permethrin products, it protects from lice for up to 14 days after one treatment. Some of the other products must be repeated after 7-10 days. This duration is important to kill any new lice that hatched from eggs that were not previously killed or removed.
Please don't hesitate to ask any follow-up questions.
Thanks! Dr. Bridget
Is this safe for the scalp and how often is it used?
Is it safe for the scalp and should be used once only once. If after 7 days you see any more lice, another treatment may be applied. I attached the product info/instructions for Nix in case you want to see everything that is involved in using the treatment.
Yes, it is safe for the scalp. You can use it daily.
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