How to treat lice with chemical solution? - briefly
Apply a pediculicide shampoo or lotion (e.g., 1 % permethrin or 0.5 % malathion) to dry hair, leave it on for the manufacturer‑specified duration, rinse, then comb out nits with a fine‑toothed comb; repeat the treatment after 7–10 days to eradicate any newly hatched lice.
How to treat lice with chemical solution? - in detail
Treating pediculosis with a chemical formulation involves several essential steps: selecting an appropriate product, preparing the scalp, applying the solution, and managing post‑treatment care.
First, choose a lice‑killing agent that contains an approved active ingredient such as permethrin (1 %), pyrethrin, malathion, or dimethicone. Verify that the concentration meets regulatory guidelines and that the product is labeled for use on the intended age group. Avoid formulations that lack clear dosage instructions or have expired.
Second, wash the hair with a mild shampoo to remove excess oils and debris. Rinse thoroughly, then towel‑dry until the scalp is damp but not dripping. The moisture level influences the distribution of the chemical and prevents rapid evaporation.
Third, apply the solution according to the manufacturer’s directions. Use a calibrated applicator or a fine‑toothed comb to spread the liquid evenly from the roots to the tips, ensuring coverage of the entire scalp surface, including the nape, behind the ears, and the crown. For products requiring a specific exposure time, set a timer and keep the hair covered with a plastic cap if instructed.
Fourth, after the prescribed contact period, rinse the hair with lukewarm water. Do not use hot water, which may degrade the active ingredient. For comb‑type treatments, repeat the combing process with a nit‑comb at 5‑day intervals for three cycles to capture any newly hatched nymphs.
Fifth, clean all personal items that may harbor eggs: wash bedding, towels, and hats in hot water (minimum 60 °C) and dry on high heat. Non‑washable items should be sealed in a plastic bag for two weeks.
Finally, monitor the scalp for signs of residual infestation, such as itching or visible lice, for up to four weeks. If symptoms persist, consider a second‑line chemical agent or consult a healthcare professional for alternative therapies.