How can lice be removed with hydrogen peroxide? - briefly
Apply a 3 % hydrogen peroxide solution to the hair and scalp, leave it for 5–10 minutes, then remove the dead insects and nits with a fine‑tooth comb; repeat the process after 7–10 days to eradicate any newly hatched lice.
How can lice be removed with hydrogen peroxide? - in detail
Hydrogen peroxide can be employed as a chemical agent to kill head‑lice and their eggs when applied correctly. The solution works by oxidizing the protein structures of the insects, causing rapid desiccation and death.
Preparation of the solution
- Use a 3 % concentration, the same strength sold for household antiseptic purposes.
- Dilute with equal parts distilled water to reduce irritation risk, especially on sensitive scalps.
- Mix thoroughly in a clean container; label to avoid accidental misuse.
Application procedure
- Separate hair into manageable sections with a fine‑toothed comb.
- Saturate each section with the peroxide mixture, ensuring the liquid reaches the scalp and covers the entire length of the hair.
- Allow the solution to remain for 5–10 minutes; this interval provides sufficient exposure for oxidative damage while limiting skin irritation.
- Rinse thoroughly with lukewarm water to remove residual peroxide.
- Comb through wet hair with a lice‑comb, starting at the scalp and moving to the tips, to dislodge dead insects and nits.
- Dispose of the comb and any collected debris in a sealed bag.
Follow‑up treatment
- Repeat the entire process after 7–10 days, targeting any newly hatched lice that escaped the first application.
- Maintain regular combing sessions every 2–3 days for two weeks to ensure complete eradication.
Safety considerations
- Perform a patch test on a small scalp area 24 hours before full application; discontinue if redness, burning, or swelling occurs.
- Avoid use on children under 2 years, on broken skin, or on individuals with known peroxide sensitivity.
- Do not combine with other chemical pediculicides, as synergistic reactions may increase toxicity.
- Store the solution away from heat and light to prevent degradation.
Limitations
- Hydrogen peroxide does not dissolve the cement that secures nits to hair shafts; mechanical removal with a fine comb remains essential.
- Over‑application can cause scalp dryness, hair bleaching, or irritation; adhere strictly to the recommended exposure time.
When integrated with diligent combing and a second‑round treatment, a properly diluted peroxide regimen provides an effective, low‑cost method for eliminating head‑lice infestations.