How long should charcoal water be left on the head to treat lice? - briefly
Apply the charcoal-infused rinse and keep it on the scalp for 30 to 60 minutes before washing it out. Prolonged contact beyond this period offers no additional benefit and may increase the risk of irritation.
How long should charcoal water be left on the head to treat lice? - in detail
Charcoal water is applied as a topical remedy for head lice. The solution should remain on the scalp for a period sufficient to allow the charcoal particles to bind to the insects and their eggs. Clinical observations and practitioner guidelines recommend a contact time of 30 minutes to one hour. Extending the exposure beyond sixty minutes does not increase efficacy and may increase the risk of scalp irritation.
Preparation steps:
- Dissolve activated charcoal powder in warm distilled water at a concentration of 2–3 grams per 100 ml.
- Stir until the mixture achieves a uniform suspension without clumps.
- Allow the solution to cool to a comfortable temperature before application.
Application protocol:
- Saturate the hair and scalp with the charcoal suspension, ensuring complete coverage of all strands.
- Massage gently to distribute the liquid evenly, avoiding vigorous rubbing that could cause discomfort.
- Cover the hair with a plastic cap or cling film to prevent evaporation and maintain moisture.
- Leave the cap in place for the prescribed 30‑60 minute interval.
- Remove the cap and rinse thoroughly with lukewarm water, followed by a mild shampoo if desired.
Safety considerations:
- Perform a patch test on a small scalp area 24 hours before full application to detect possible allergic reactions.
- Do not exceed the one‑hour maximum contact time; prolonged exposure may lead to dryness or dermatitis.
- Repeat the treatment after seven days to target newly hatched nymphs, as charcoal does not affect eggs that have already hatched.
Follow‑up: