How to be sure that there are no more lice? - briefly
Perform a meticulous visual inspection of the scalp and hair after treatment, using a fine‑toothed nit comb under bright light, and repeat the examination daily for at least a week. Absence of live insects and viable eggs during these checks confirms successful elimination.
How to be sure that there are no more lice? - in detail
Confirming that head‑lice have been completely eradicated requires a systematic approach that combines visual inspection, appropriate treatment verification, and environmental checks.
Begin with a thorough examination of the scalp. Use a fine‑toothed nit comb on wet, conditioned hair. Separate sections from the crown to the nape, pulling each strand taut while combing from scalp to tip. After each pass, wipe the comb on a white towel or rinse it in a bowl of water. Continue until no live insects or viable nits are observed in a given section. Repeat the process on both sides of the head and on any hair extensions or wigs.
If the initial inspection yields no findings, repeat the visual check after 7–10 days. Lice eggs hatch within this interval; a second combing session will reveal any survivors that escaped the first treatment. Conduct a third inspection after an additional 7 days to cover the full life cycle.
Verify treatment efficacy by confirming that the product used was applied according to label instructions—correct dosage, sufficient exposure time, and complete coverage of all hair and scalp areas. For prescription or over‑the‑counter options, ensure that any required repeat dose (often 7–10 days later) is administered.
Inspect personal items that come into direct contact with the head. Wash bedding, hats, scarves, and hair accessories in hot water (≥60 °C) or seal them in a plastic bag for two weeks to starve any remaining insects. Vacuum upholstered furniture and car seats, focusing on crevices where lice may hide.
Document each inspection date, the method used, and the outcome. A clear record of three consecutive negative examinations, combined with proper treatment and environmental sanitation, provides reliable confirmation that the infestation has been eliminated.