How long should kerosene be kept on the head to treat lice? - briefly
Leave the kerosene on the scalp for about 15–30 minutes before washing it off thoroughly. Do not exceed this duration to minimize skin irritation.
How long should kerosene be kept on the head to treat lice? - in detail
Kerosene has been employed in some regions as a home remedy for head‑lice infestations. Its effectiveness relies on suffocating the insects, but the method carries significant health risks and should be applied with strict timing limits.
The contact period that produces a measurable effect without excessive irritation is generally 15 – 20 minutes. Extending exposure beyond 30 minutes markedly increases the chance of skin redness, chemical burns, and respiratory discomfort. A maximum of half an hour is advised only in exceptional cases and under medical supervision.
Application procedure:
- Warm kerosene to room temperature; avoid heating above 30 °C.
- Apply a thin layer to the scalp, ensuring coverage of hair shafts but not excess pooling.
- Cover the head with a non‑flammable plastic cap or clean towel to prevent evaporation.
- Set a timer for the chosen duration (15–20 minutes).
- After the interval, remove the covering, rinse the hair thoroughly with mild soap and warm water.
- Dry the scalp gently; inspect for residual oil or irritation.
Safety precautions:
- Perform the treatment in a well‑ventilated area away from open flames or sparks.
- Keep children and pets out of the vicinity.
- Use disposable gloves to avoid skin contact with the liquid.
- Discontinue immediately if burning, itching, or respiratory symptoms appear.
- Do not repeat the procedure more than once within a two‑week span; repeated use heightens toxicity risk.
Modern alternatives—permethrin‑based shampoos, dimethicone lotions, and fine‑tooth combs—offer comparable eradication rates with far lower adverse‑effect profiles. When kerosene is chosen, adhere strictly to the 15‑ to 20‑minute window and observe all protective measures to minimize harm.