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Head lice sends a wave of dread through school pickup lines every year, and it's one of the most repeatedly searched childhood health topics for a reason: it's extremely common, spreads easily among kids in close contact, and carries a stigma it genuinely doesn't deserve.
Lice have nothing to do with cleanliness
This is worth saying plainly, because the stigma is the part that causes the most unnecessary distress: lice prefer clean hair just as much as dirty hair, and having lice reflects close contact with an infested person or their belongings — not poor hygiene. It spreads mainly through direct head-to-head contact, and less commonly through shared hats, brushes, or pillows.
How to check for lice
- Use a bright light and a fine-toothed lice comb, working through small sections of dry or wet hair.
- Look for live lice (small, fast-moving, tan to grayish-white) and nits (tiny eggs firmly glued to the hair shaft, usually close to the scalp).
- Nits are often mistaken for dandruff, but unlike dandruff they don't brush or flick off easily — they're attached with a natural glue-like substance.
- Check behind the ears and at the nape of the neck first — the most common areas lice are found.
What actually treats it
Over-the-counter treatments containing permethrin are the standard first-line option and work well in most cases, though resistance has grown in some areas, so a second treatment 7-9 days later is standard to catch any newly hatched lice the first round missed. Combing wet hair with a fine-toothed nit comb, repeated every few days for two weeks, meaningfully improves success rates alongside any treatment product.
Home remedies (mayonnaise, olive oil, suffocation methods) are popular online but have inconsistent evidence — a proper treatment plus thorough combing remains the most reliable approach if the first-line option isn't working.
What to do about school and other kids
Most current school guidance has moved away from strict "no return until nit-free" policies, since they're not well-supported by evidence and cause unnecessary missed school days — many schools now allow return after the first treatment. Check your specific school's actual policy rather than assuming the older, stricter standard.
Frequently asked questions
Can you get lice from a pet?
No — head lice are species-specific to humans and cannot live on or spread from cats or dogs. Pets are never part of a lice treatment plan.
How long does it take to get rid of lice completely?
With correct treatment and follow-up combing, most cases clear within 2-3 weeks, including the required second treatment round to catch newly hatched lice. Ongoing new cases usually mean reinfestation from a shared contact, not treatment failure.
Do I need to wash everything in the house?
No — lice die within a day or two away from a human scalp, so extensive home treatment is unnecessary. Washing recently-used pillowcases, hats, and hair accessories in hot water is a reasonable, proportionate step; deep-cleaning the whole house is not needed.
