How to use hydrogen peroxide for lice? - briefly
Apply a 3% hydrogen peroxide solution to the scalp, fully saturating the hair and leaving it for 10–15 minutes before rinsing completely; repeat the treatment after 7–10 days to eradicate any newly hatched nits.
How to use hydrogen peroxide for lice? - in detail
Hydrogen peroxide can serve as a topical agent to kill lice and their eggs when applied correctly. Use a 3 % solution, the concentration commonly sold in pharmacies, because higher strengths increase the risk of skin irritation and scalp damage.
First, dampen the hair with warm water. Apply the peroxide directly to the scalp and hair, ensuring full coverage from the roots to the tips. Use a spray bottle or a cotton applicator to distribute the liquid evenly. Allow the solution to remain on the hair for 10 minutes; this period permits the oxidative action to disrupt the lice exoskeleton and damage egg membranes.
After the exposure time, rinse the hair thoroughly with lukewarm water. While rinsing, employ a fine-toothed lice comb to separate dead insects and nits from the strands. Comb in sections, starting at the scalp and moving toward the ends, cleaning the comb after each pass to prevent re‑contamination.
Repeat the entire procedure after 7 days. This interval targets any newly hatched lice that survived the initial treatment, as the life cycle from egg to adult lasts approximately 7–10 days. A second application ensures complete eradication.
Safety considerations include:
- Perform a patch test on a small skin area 24 hours before full application to detect possible allergic reactions.
- Avoid contact with eyes; if accidental exposure occurs, flush with copious water and seek medical advice.
- Do not use concentrations above 3 % without professional supervision.
- Discontinue use if scalp irritation, redness, or burning develops; wash the scalp with mild shampoo and consult a healthcare provider.
Additional measures that improve results:
- Wash bedding, clothing, and personal items in hot water (≥ 60 °C) and dry on high heat.
- Vacuum carpets and upholstered furniture to remove fallen lice and eggs.
- Seal non‑washable items in sealed plastic bags for two weeks to starve any remaining organisms.
When applied with the outlined protocol, hydrogen peroxide acts as an effective, inexpensive method for eliminating head lice while minimizing adverse effects.