How many days are needed to treat lice? - briefly
Effective lice treatment typically involves a 7‑day course, with a second application on day 7 to eliminate newly hatched nits. The overall process may extend to 10 days depending on the specific product guidelines.
How many days are needed to treat lice? - in detail
The length of a lice eradication program depends on the insect’s life cycle. Eggs (nits) hatch within 7‑10 days, so a single application cannot eliminate all newly emerged lice. Consequently, treatment must span at least two weeks to cover the initial infestation and the subsequent hatchlings.
The standard over‑the‑counter regimen involves:
- Application of a pediculicide on the first day, following the product’s instructions for scalp coverage and exposure time.
- Thorough combing with a fine‑toothed nit comb to remove dead insects and loose nits.
- Re‑application after 7‑10 days to target lice that hatched from surviving eggs.
- Additional combing sessions after the second treatment to verify complete removal.
Prescription options follow similar principles but may differ in timing:
- Oral ivermectin is often given as a single dose, with a repeat dose 7 days later.
- Topical malathion or benzyl alcohol preparations may require a second application 2‑3 days after the first, followed by a final check 7‑10 days later.
Environmental control measures include washing bedding, clothing, and personal items in hot water (≥ 50 °C) or sealing non‑washable items in a plastic bag for 48 hours. Vacuuming carpets and upholstery reduces the risk of re‑infestation but does not replace the need for direct scalp treatment.
A concise timeline for most effective management:
«Day 0 – Initial treatment and nit combing»
«Day 7‑10 – Second application to eliminate hatchlings»
«Day 14 – Final inspection; repeat combing if any nits remain»
If nits persist after the second application, a third treatment may be necessary, typically scheduled 7 days after the last check. Following this structured schedule ensures elimination of the infestation within 14‑21 days.