What should be done if there are many lice? - briefly
Treat the infestation with a proven pediculicide, following the product’s instructions for dosage and repeat treatment after 7–10 days; simultaneously wash all bedding, clothing, and personal items in hot water or seal them in plastic bags for two weeks. Conduct thorough combing of hair with a fine-toothed lice comb daily until no live lice or nits are detected.
What should be done if there are many lice? - in detail
When an infestation reaches a high level, immediate and systematic action is required to eliminate the parasites and prevent re‑infestation.
First, isolate the affected individuals. Separate clothing, bedding, and personal items from those of uninfested persons. Wash all washable fabrics in hot water (minimum 130 °F/54 °C) and dry on high heat for at least 30 minutes. For non‑washable items, seal them in plastic bags for two weeks to deprive lice of a viable environment.
Second, apply an approved topical pediculicide. Follow the product label precisely: apply to dry hair, leave for the recommended duration, then rinse thoroughly. Repeat the treatment after 7–10 days to target newly hatched nymphs that survived the first application. Use a fine‑toothed comb to remove dead lice and eggs after each treatment; combing should be performed on wet hair, section by section, for at least 10 minutes per session.
Third, treat the immediate environment. Vacuum carpets, upholstered furniture, and vehicle seats. Dispose of the vacuum bag or empty the canister into a sealed bag. Clean hairbrushes, combs, and hair accessories by soaking them in hot, soapy water for 10 minutes, then rinsing and drying.
Fourth, educate all household members about detection and prevention. Encourage regular head checks, especially after contact with schools or group activities. Recommend avoiding the sharing of hats, helmets, hair accessories, and bedding.
Finally, monitor for recurrence. Conduct weekly inspections for at least four weeks. If live lice are observed after the second treatment cycle, consult a healthcare professional for alternative medications or prescription options.
By adhering to this sequence—containment, chemical treatment, mechanical removal, environmental sanitation, education, and ongoing surveillance—the infestation can be eradicated efficiently and sustainably.