How much kerosene is needed to fight lice? - briefly
Kerosene is not a safe or effective method for lice eradication; no dosage can be recommended because of its toxic properties. Approved treatments such as pediculicides or manual removal remain the only medically endorsed options.
How much kerosene is needed to fight lice? - in detail
Kerosene is a hydrocarbon solvent with strong irritant properties. Its application against head‑lice infestations relies on direct contact with the insects, causing rapid desiccation. Determining a safe and effective volume requires consideration of concentration, exposure time, and the risk of dermal toxicity.
The recommended quantity for a single treatment on an average adult scalp does not exceed 0.5 mL of pure kerosene, diluted with an equal volume of a non‑flammable carrier such as mineral oil. This dilution reduces the likelihood of skin irritation while preserving sufficient lethality for lice and nits. Application should involve a thin layer spread evenly over the hair and scalp, ensuring complete coverage without excess pooling.
Key safety parameters:
- Maximum concentration: 50 % kerosene in carrier oil.
- Exposure duration: 10–15 minutes before thorough rinsing with warm water and a mild shampoo.
- Frequency: No more than one application per week; repeated use increases the risk of dermatitis and systemic absorption.
- Precautions: Avoid use on children under two years, on broken skin, or in the presence of open wounds. Conduct a patch test on a small skin area 24 hours before full application.
Potential adverse effects include erythema, itching, and chemical burns if the solution is applied in higher concentrations or left on the scalp for extended periods. Systemic toxicity may manifest as dizziness, nausea, or respiratory irritation when inhaled in confined spaces. Proper ventilation and protective gloves are essential during preparation and application.
Alternative treatments with established safety profiles—such as permethrin‑based lotions, dimethicone creams, or mechanical removal with fine‑tooth combs—should be considered as first‑line options. Kerosene remains a last‑resort measure, appropriate only when conventional pediculicides are unavailable and when the user can adhere strictly to the dosage and safety guidelines outlined above.