How to kill lice with hydrogen peroxide? - briefly
Apply 3 % hydrogen peroxide generously to the scalp and hair, let it act for 5–10 minutes, then rinse thoroughly with warm water. Repeat the procedure after 7–10 days to eradicate any newly hatched nits.
How to kill lice with hydrogen peroxide? - in detail
Hydrogen peroxide can be an effective agent against head‑lice when applied correctly. The compound works by oxidizing the chitin exoskeleton and disrupting the respiratory system of the insects, leading to rapid mortality.
A typical protocol includes the following steps:
- Choose a 3 % hydrogen peroxide solution, the concentration commonly sold for household use. Higher concentrations increase the risk of scalp irritation and should be avoided.
- Dilute the solution with an equal part of distilled water to achieve a 1.5 % mixture, unless the user’s scalp is particularly sensitive, in which case a 1 % solution may be safer.
- Apply the diluted liquid to dry hair, ensuring thorough saturation from the roots to the tips. Use a spray bottle or a cotton applicator for even distribution.
- Cover the hair with a plastic cap or a shower cap to prevent evaporation. Maintain contact for 10–15 minutes; longer exposure does not improve results and may increase irritation.
- Rinse the hair thoroughly with lukewarm water. Follow with a fine‑toothed lice comb, moving from scalp to ends to remove dead insects and nits.
- Repeat the treatment after 7–10 days, as any surviving nits will hatch within this window.
Safety considerations are essential. Perform a patch test on a small skin area 24 hours before the full application to detect possible allergic reactions. Avoid contact with eyes; if accidental exposure occurs, rinse immediately with copious water. Do not use the method on broken skin, infants under six months, or individuals with known peroxide sensitivity.
For maximal efficacy, combine the chemical approach with mechanical removal (combing) and environmental control: wash bedding, hats, and hair accessories in hot water (≥ 60 °C) or seal them in a plastic bag for two weeks to eliminate residual lice and eggs.
The described regimen provides a scientifically grounded, low‑cost alternative to conventional pediculicides, delivering reliable extermination when executed with precision and adherence to safety guidelines.