How can you treat the head for lice with chlorine water? - briefly
Apply a diluted chlorine solution (approximately 1 % sodium hypochlorite) to the scalp, let it act for 10–15 minutes, then rinse thoroughly and comb out the nits. Use protective gloves, avoid contact with eyes, and repeat the treatment after seven days to eliminate any newly hatched lice.
How can you treat the head for lice with chlorine water? - in detail
Chlorine‑based solutions can be employed as a lice‑killing agent when applied to the scalp and hair. The method relies on the insecticidal properties of sodium hypochlorite, the active component of household bleach. Follow the protocol below to achieve maximum efficacy while minimizing risk to the wearer.
Prepare a dilution that contains approximately 0.5 % sodium hypochlorite. Mix one part of regular liquid bleach (5–6 % sodium hypochlorite) with nine parts of clean water. Stir the mixture thoroughly; the resulting solution should be clear and slightly milky.
Before treatment, separate the hair from any accessories and brush it to remove tangles. Apply the diluted solution to the scalp and throughout the hair shaft, ensuring thorough wetting. Use a spray bottle or a cup to distribute the liquid evenly. Allow the solution to remain on the hair for 10–15 minutes. During this period, the chlorine penetrates the exoskeleton of lice and their eggs, disrupting cellular function.
After the exposure time, rinse the hair with lukewarm water until all traces of the solution are removed. Follow with a gentle shampoo to eliminate residual chlorine odor. Dry the hair with a clean towel; avoid heat styling devices for at least 30 minutes.
Repeat the entire process after 7 days. This interval targets any newly hatched nymphs that survived the first application. A second treatment is typically sufficient to eradicate the infestation.
Safety considerations:
- Perform a patch test on a small skin area 24 hours before full application to detect possible irritation.
- Do not use the solution on broken skin, open wounds, or on individuals with known chlorine hypersensitivity.
- Wear disposable gloves while mixing and applying the solution to protect hands.
- Ensure adequate ventilation; chlorine vapors can cause respiratory irritation in confined spaces.
- Keep the mixture away from children and pets; store any remaining solution in a clearly labeled, sealed container.
Effectiveness data indicate that a 0.5 % chlorine concentration kills adult lice and eggs within the prescribed exposure time. However, the method does not address reinfestation from external sources; maintain regular hair hygiene, avoid sharing personal items, and clean bedding and clothing in hot water to prevent recurrence.