How can lice be removed using hydrogen peroxide? - briefly
Apply a 3 % hydrogen peroxide solution directly to the scalp, saturating the hair and allowing it to act for 5‑10 minutes before removing nits with a fine‑toothed lice comb. Rinse thoroughly and repeat the treatment after seven days to eradicate any newly hatched lice.
How can lice be removed using hydrogen peroxide? - in detail
Hydrogen peroxide can serve as a chemical agent that kills lice and their eggs when applied to the scalp. The oxidizing action disrupts the exoskeleton of the insects, leading to rapid mortality.
To prepare a safe solution, use a commercially available 3 % hydrogen peroxide solution. If a milder concentration is desired, dilute with an equal part of distilled water to obtain a 1.5 % mixture. Conduct a patch test on a small area of skin for at least five minutes; discontinue use if redness or burning occurs.
Application steps:
- Separate hair into sections using a fine‑toothed comb.
- Saturate each section with the peroxide solution, ensuring thorough coverage of the scalp and hair shafts.
- Cover the treated area with a plastic cap or cling film to prevent evaporation.
- Maintain contact for 10–15 minutes; longer exposure increases the risk of irritation without substantially improving efficacy.
- Rinse hair with lukewarm water and a mild shampoo; avoid hot water, which can intensify scalp sensitivity.
- Comb through the hair with a nit comb while it is still damp, removing dead insects and nits.
- Repeat the entire process after 7–10 days to address any newly hatched lice.
Safety considerations:
- Do not apply the solution to broken skin, open wounds, or the eyes.
- Children younger than two years should not be treated with peroxide; alternative mechanical removal is preferred.
- Pregnant or lactating individuals should consult a healthcare professional before use.
- Prolonged or repeated exposure may cause hair discoloration or scalp dryness; condition the scalp with a non‑oil‑based moisturizer if needed.
Evidence from controlled studies indicates that a 3 % peroxide solution achieves mortality rates of 80–90 % for live lice but is less effective against dormant eggs. Consequently, mechanical removal of nits remains essential for complete eradication.
After treatment, wash bedding, clothing, and personal items in hot water (≥ 60 °C) or place them in a sealed plastic bag for two weeks to prevent reinfestation. Regular inspection of the scalp for several weeks confirms the success of the regimen.