A member asked:

What could cause a child to get head lice a few months after getting rid of it?

16 doctors weighed in across 2 answers

Re-exposure...: Of course, some of the commercial and even prescription pediculocides (lice medicines) require 2 separate applications given about a week apart. Just make sure to follow your doctor's directions or the directions on the bottle, and remind your little one to not share caps/hats/bandanas or combs/brushes with other children.

Answered 4/30/2016

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Reinfection: If truly gone the 1st time, only reinfection causes reoccurance. Remember there is no immunity built up to lice.

Answered 9/28/2016

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