How can you remove lice using chlorinated water? - briefly
Lice are killed by soaking hair in chlorinated water (minimum 0.5 ppm chlorine) for 15–20 minutes, then removing any remaining insects with a fine-toothed comb. A second soak after 7–10 days eliminates newly hatched nymphs.
How can you remove lice using chlorinated water? - in detail
Chlorine‑based water can serve as an effective agent for eliminating head‑lice infestations when applied correctly. The oxidizing properties of chlorine disrupt the nervous system of the parasites, leading to rapid mortality. Additionally, chlorine reduces the viability of eggs by impairing the protective coating.
Preparation requires a controlled concentration of free chlorine between 0.5 mg/L and 1 mg/L. Household tap water typically contains sufficient chlorine for this purpose; if not, a measured amount of household bleach (5 % sodium hypochlorite) may be added, using the ratio of one millilitre per litre of water to achieve the target level. A chlorine test strip should verify the concentration before use.
The treatment procedure consists of the following steps:
- Wet the hair thoroughly with the prepared chlorinated water, ensuring complete coverage of the scalp and strands.
- Allow the water to remain on the hair for five minutes; this duration maximizes contact with both adult insects and nymphs.
- While the water is still damp, pass a fine‑toothed lice comb through each section of hair from root to tip, removing dead insects and remaining eggs.
- Rinse the hair with clean, non‑chlorinated water to eliminate residual chlorine, reducing the risk of irritation.
- Dry the hair with a clean towel; avoid heat styling devices for at least 24 hours to prevent scalp discomfort.
Repeating the process after 7–10 days addresses any newly hatched nymphs that escaped the initial exposure. Concurrently, laundering bedding, hats, and clothing in hot water (minimum 60 °C) eliminates surviving stages in the environment.
Safety considerations include monitoring for skin redness or itching, which may indicate chlorine sensitivity. Individuals with compromised skin barriers, infants under six months, or those with known chlorine allergies should avoid this method. Protective gloves are recommended when handling diluted bleach solutions. Pets should be kept away from treated areas until the hair is fully rinsed.
When executed with precise concentration control and proper follow‑up, chlorinated water provides a practical, chemical‑free solution for controlling head‑lice populations.