How long should kerosene be left on the head to treat lice? - briefly
There is no safe amount of time to leave kerosene on the scalp; it should not be used as a lice treatment.
How long should kerosene be left on the head to treat lice? - in detail
Kerosene is occasionally mentioned in traditional lice‑removal methods, but medical authorities advise against its use because of skin irritation, respiratory toxicity, and fire risk. If a person nonetheless applies it, the exposure period should be as short as possible—no more than five minutes. After this brief interval the scalp must be washed thoroughly with warm water and a mild soap to remove all residue.
Key points for a single, limited application:
- Apply a thin layer of kerosene to dry hair, avoiding contact with eyes and mucous membranes.
- Cover the head with a clean, non‑flammable cloth to prevent dripping.
- Keep the mixture on the scalp for a maximum of five minutes.
- Remove the cloth, then rinse the hair repeatedly until no oily feel remains.
- Inspect the scalp for redness, itching, or burns; seek medical attention if symptoms develop.
Safety considerations:
- Do not repeat the procedure; repeated exposure increases toxicity.
- Children, pregnant women, and individuals with dermatitis are especially vulnerable.
- Keep kerosene away from open flames and heat sources throughout the process.
- Store the product in a locked container out of reach of minors.
Professional lice treatments—permethrin shampoo, ivermectin, or mechanical removal with a fine‑toothed comb—provide proven efficacy without the hazards associated with petroleum products. If kerosene has been used and adverse effects appear, contact a healthcare provider promptly.