What to do if you find a louse in your head? - briefly
Isolate the affected hair, comb it with a fine‑toothed lice comb to extract the parasite and any attached eggs. Then wash the scalp with hot water, apply an approved pediculicide, and repeat the process after 7–10 days to prevent re‑infestation.
What to do if you find a louse in your head? - in detail
Finding a live head‑lice requires swift action to eliminate the parasite and avoid reinfestation. First, verify the presence by inspecting the scalp and hair under bright light; adult lice are about 2–3 mm long, brownish, and move quickly, while nits appear as tiny, oval, yellow‑white shells attached close to the hair shaft.
Isolate the affected individual from others until treatment is complete. Avoid sharing hats, combs, hair accessories, pillows, or towels. Wash hands thoroughly after handling the scalp.
Removal proceeds in three stages:
- Mechanical extraction – Apply a fine‑toothed lice comb to wet, conditioned hair. Starting at the scalp, pull the comb through each section, wiping the teeth after every pass. Repeat until no live insects are observed.
- Chemical treatment – Use an over‑the‑counter pediculicide containing 1 % permethrin or 0.5 % pyrethrin, following the manufacturer’s instructions precisely. Apply to dry hair, leave for the recommended duration, then rinse.
- Secondary application – After 7–10 days, repeat the combing or apply a second dose of the same product to target newly hatched nymphs, which are less susceptible to the initial dose.
Sanitize the environment:
- Machine‑wash clothing, bedding, and towels used within the past 48 hours in hot water (≥60 °C) and tumble‑dry on high heat.
- Seal non‑washable items (e.g., hats, scarves) in a sealed plastic bag for two weeks.
- Vacuum carpets, upholstered furniture, and car seats; discard the vacuum bag or clean the canister afterward.
Monitor for recurrence by examining the scalp daily for the next two weeks. If live lice persist after two treatment cycles, consult a healthcare professional for prescription‑strength options such as malathion or ivermectin. Document any adverse reactions to topical agents and discontinue use if irritation occurs.