I can't get rid of lice — what to do? - briefly
Apply an FDA‑approved pediculicide according to the label, repeat the treatment after 7–10 days, and simultaneously comb wet hair with a fine-tooth nit comb while washing bedding, clothing, and personal items in hot water.
I can't get rid of lice — what to do? - in detail
Lice infestations persist when eggs (nits) remain attached to hair shafts and survive after initial treatment. Understanding the parasite’s life cycle—egg, nymph, adult—guides effective eradication.
First, confirm the presence of live insects. Use a fine-tooth comb on damp hair under bright light; moving insects or empty shells indicate active infestation. If only empty shells are found, a single treatment cycle may suffice.
Next, choose a proven method:
- Over‑the‑counter pediculicides containing 1 % permethrin or 0.5 % pyrethrin. Apply according to the product label, leave for the recommended time, then rinse thoroughly.
- Prescription agents such as 0.5 % malathion, 0.05 % ivermectin lotion, or 1 % spinosad for resistant strains. Obtain these from a healthcare professional.
- Physical removal with a nit‑comb (metal or fine‑plastic). Comb hair in sections from scalp to tips, cleaning the comb after each pass. Repeat every 2–3 days for two weeks.
After the initial application, repeat the treatment 7–10 days later to target newly hatched nymphs that survived the first dose. Follow up with combing sessions every 2 days for at least two weeks to ensure all eggs are eliminated.
Supportive measures reduce reinfestation risk:
- Wash all bedding, clothing, and towels used in the preceding 48 hours in hot water (≥ 60 °C) and dry on high heat.
- Seal non‑washable items (e.g., stuffed toys) in airtight bags for two weeks.
- Vacuum carpets, upholstered furniture, and car seats to remove stray hairs and lice.
- Instruct all household members to avoid sharing hats, brushes, or hair accessories during treatment.
Monitor the situation. If live lice persist after two full treatment cycles, consult a medical professional for alternative regimens or combination therapy. Persistent cases may require laboratory confirmation of resistance and tailored prescription medication.