Medically reviewed by Dr. Mary Alice Mina, board-certified dermatologist. This content is for educational and informational purposes only and does not constitute medical advice. For concerns specific to you or your child, please consult your dermatologist or pediatrician.
The Skin Real | Blog | With Dr. Mary Alice Mina, board-certified dermatologist
The note comes home from school, and it says there has been a case of head lice in the classroom. Your stomach drops, and your first instinct is to reach for the clippers or start bagging up every stuffed animal in the house. I want you to take a breath, because head lice are common, they are treatable, and they are far less dramatic than the panic that usually comes with them. On this week’s episode of The Skin Real I walked through what to do, and here is the calm version you can keep on hand.
What Head Lice Actually Are, and What They Are Not
Head lice are tiny insects that live on the scalp and feed on small amounts of blood. The most important thing to understand is that lice have nothing to do with hygiene or how clean your home is. They are not a sign that you did something wrong, and they do not care whether hair is freshly washed or not.
They also do not fly or jump. Lice spread mainly through close head-to-head contact, which is why they move so easily among young children who lean in while they play. They do not leap from one scalp to another across a room, so the situation is more contained than it feels in the moment.
How to Check for Lice and Nits at Home
You can do a thorough check at home with good lighting and a little patience. Part the hair in small sections and look closely at the scalp and along the hair shaft, paying attention to the area behind the ears and near the nape of the neck where lice like to settle.
Nits, which are the eggs, are the part people most often confuse with something harmless. Dandruff and product flakes brush away easily, and nits do not. Nits are firmly attached to the hair shaft, they sit close to the scalp, and they stay put when you try to flick them off. That stubbornness is one of the clearest ways to tell the difference.
How to Treat Head Lice the Right Way
Most cases can be handled with over-the-counter treatments that contain permethrin or pyrethrin. These work when you use them exactly as directed, so read the full instructions before you start and follow the timing on the label rather than rushing through it.
The Mistake That Lets Lice Come Back
The most common reason lice seem to return is that treatment stops too soon. According to the Centers for Disease Control and Prevention (CDC), permethrin and pyrethrin products do not reliably kill all of the unhatched eggs, so a second treatment is usually needed about nine days later to catch any lice that hatch after the first round. Combing through with a fine-tooth comb between treatments removes lice and nits you would otherwise miss.
Supporting evidence, not a claim made in the episode. Source: CDC, Head Lice Treatment.
When Over-the-Counter Treatment Does Not Work
Sometimes the drugstore options are not enough. If you have followed the directions carefully, completed the second treatment, and you are still finding live lice, that is the moment to reach out to your dermatologist or pediatrician. There are prescription treatment options available, and a clinician can help you choose the right next step instead of layering on product after product at home.
Cleaning Your Home Without Going Overboard
You do not need to deep-clean your entire house or throw away belongings. A focused cleanup is enough.
- Wash bedding, hats, and recently worn clothing in hot water and dry them on high heat.
- Soak brushes and combs in hot water to clean them.
- For stuffed animals and items you cannot wash, sealing them in a bag for a couple of weeks is a simple way to handle them.
Your Quick Action Plan
- Check carefully in good light, and remember that nits stay stuck to the hair while dandruff brushes away.
- Treat with a permethrin or pyrethrin product exactly as directed, and comb through with a fine-tooth comb.
- Plan on a second treatment about nine days later so newly hatched lice do not restart the cycle.
- Call your dermatologist or pediatrician if live lice remain after you have done everything correctly.
The Bottom Line
Head lice are common, they are not a reflection of your hygiene, and they respond well to a clear, steady plan. Check thoroughly, treat correctly, repeat the treatment on schedule, and clean the items that actually matter, and you can move through this calmly.
Want the full, visual walk-through? Watch this week’s head lice episode of The Skin Real on YouTube, and for more no-fluff, science-based guidance on your skin and your family’s skin, explore the podcast and the free resources at theskinreal.com.