Head lice: 11 myths debunked

Find out what you can do to treat and prevent a lice infestation.

Jan, 2026

MYTH: Lice can jump from person to person

MYTH: You should use a bright light to find lice

MYTH: One nit is enough to diagnose an infestation

MYTH: Anti-lice shampoo is all you need to treat head lice

MYTH: If the medication doesn’t work, repeat as often as needed

MYTH: You can wash your child's hair the day after applying lice shampoo

MYTH: Alternative lice treatments don't work

MYTH: You have to clean your home from top to bottom

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Slide 1

If you have a preschool or elementary school child, you know that head lice are all too common. In fact, 6 to 12 million lice infestations occur each year in the United States among kids ages 3 to 11 years old, according to the the Centers for Disease Control and Prevention (CDC).

But don’t panic. There’s a lot of misinformation about lice, from how they spread to how infestations are treated. Here are the facts you need to know to treat lice problems—and to prevent them in the first place.

Written byMichael Gollust.

Medically reviewed byAmy Gonzales, MD.June, 2024

Sources: Centers for Disease Control and Prevention (CDC). About Head Lice. June 4 + 13

Centers for Disease Control and Prevention (CDC). About Head Lice. June 4, 2024.
Centers for Disease Control and Prevention (CDC). About Lice. September 4, 2024.
Centers for Disease Control and Prevention (CDC). Treatment of Head Lice. November 12, 2024.
Candy, K., Brun, S., et al. Do drowning and anoxia kill head lice? Parasite. 2018;25(8).
CDC. How to Examine for Head Lice. April 2021.
Al Aboud D. M., & Gossman W. Wood's Light. In: StatPearls. NCBI Bookshelf version. StatPearls Publishing: September 30, 2021.
Takano-Lee M., Edman J. D., et al. Home remedies to control head lice: assessment of home remedies to control the human head louse, Pediculus humanus capitis (Anoplura: Pediculidae). J Pediatr Nurs. 2004;19(6):393-8.
Cummings, C., Finlay, J. C., & MacDonald, N. E. Head lice infestations: A clinical update. Paediatrics & Child Health. 2018;23(1), e18–e24.
U.S Food and Drug Administration. Treating and Preventing Head Lice. October 27, 2020.
Di Campli E, Di Bartolomeo S, et al. Activity of tea tree oil and nerolidol alone or in combination against Pediculus capitis (head lice) and its eggs. Parasitol Res. 2012 Nov;111(5):1985-92.
Gibson County Health Department (IN). Head Lice Elimination Information. Accessed September 15, 2022.
Barker SC, Altman PM. An ex vivo, assessor blind, randomised, parallel group, comparative efficacy trial of the ovicidal activity of three pediculicides after a single application--melaleuca oil and lavender oil, eucalyptus oil and lemon tea tree oil, and a "suffocation" pediculicide. BMC Dermatol. 2011 Aug 24;11:14.
Koch E, Clark JM, et al. Management of Head Louse Infestations in the United States—A Literature Review. Pediatric Dermatology. September/October 2016; 33(5):466-472.
Obaid HM. Home remedies for Pediculus humanus capitis infection among schoolchildren. Our Dermatol Online. 2018;9(2):131-136.

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