What to do if lice keep appearing? - briefly
Treat all carriers with an effective pediculicide, launder bedding and clothing at 130 °F, and vacuum furniture and floors thoroughly; then comb hair daily with a fine-tooth nit comb for two weeks, repeating the process if any nits reappear. Continue weekly inspections for at least four weeks to ensure the infestation does not return.
What to do if lice keep appearing? - in detail
Recurring head‑lice infestations require a systematic approach that addresses both the individuals affected and the surrounding environment. Begin with a thorough inspection of the scalp, hairline, and behind the ears using a fine‑tooth lice comb. Remove any visible insects and nits, wiping the comb on a white tissue after each pass to confirm extraction.
Apply an approved pediculicide according to the product’s instructions, ensuring complete coverage of the hair and scalp. Leave the medication for the specified duration; do not rinse early. After the initial treatment, repeat the application after seven to ten days to eliminate newly hatched lice that survived the first round.
Sanitize personal items and the household environment. Wash clothing, bedding, and towels used within the previous 48 hours in hot water (≥ 130 °F) and dry on high heat. Seal non‑washable items in sealed plastic bags for two weeks, the typical lifespan of a louse. Vacuum carpets, upholstered furniture, and car seats; discard vacuum bags promptly.
Educate all household members about avoiding head‑to‑head contact, sharing hats, hairbrushes, or headphones, and performing regular self‑checks. Consider treating all close contacts simultaneously, even if they show no signs, to prevent re‑infestation.
If infestations persist after two complete treatment cycles, evaluate the following possibilities:
- Resistance to the chosen pediculicide; switch to a product with a different active ingredient.
- Incomplete removal of nits; increase combing frequency and use a fine‑tooth nit comb.
- Reinfection from untreated contacts outside the household; extend treatment to schools or daycare centers.
- Underlying scalp conditions that hinder treatment efficacy; consult a healthcare professional.
When resistance is suspected, a prescription‑only medication such as ivermectin or malathion may be required under medical supervision. Follow up with a healthcare provider to confirm eradication and receive guidance on preventing future outbreaks.