How to use soap against lice? - briefly
Apply a regular soap to wet hair, lather from scalp to tips, leave it on for several minutes, then rinse thoroughly; comb the hair with a fine-toothed nit comb while the soap is still damp. Repeat the treatment after 7–10 days to eliminate any newly hatched lice.
How to use soap against lice? - in detail
Soap can be an effective tool for removing head‑lice when used correctly. The method relies on the soap’s ability to suffocate and detach the insects from hair shafts.
First, select a plain, fragrance‑free soap with a high surfactant concentration. Antibacterial or medicated bars are unnecessary and may irritate the scalp. Melt the soap in warm water (approximately 40 °C) until a dense lather forms. Avoid adding oils or conditioners, which can create a barrier that protects the lice.
Apply the lather directly to dry hair, ensuring every strand is coated from scalp to tips. Massage gently for 2–3 minutes; the soap penetrates the cuticle and disrupts the lice’s respiratory system. Leave the lather on the hair for an additional 5–10 minutes without rinsing. This dwell time maximizes mortality.
After the exposure period, rinse thoroughly with warm water while using a fine‑toothed nit comb. Run the comb from the scalp outward, cleaning each tooth after every pass. Dispose of combed lice and nits in sealed plastic before discarding. Repeat the combing process until no live insects are observed.
A second treatment is required 7–10 days later, coinciding with the hatching cycle of any remaining eggs. Follow the same soap application, exposure, and combing steps.
Environmental decontamination reduces reinfestation risk. Soak all clothing, bedding, and towels used within the previous 48 hours in hot water (≥60 °C) for at least 10 minutes, then tumble‑dry on high heat. Non‑washable items should be sealed in plastic bags for two weeks.
Precautions: do not use harsh detergents or soaps containing strong fragrances, as they may cause scalp irritation. Discontinue use if redness, itching, or dermatitis develops, and consult a healthcare professional. Soap treatment does not replace medical pediculicides for severe infestations; it serves as a complementary, low‑cost approach.