How long should kerosene be applied for lice? - briefly
Kerosene is not a safe or approved lice treatment; any contact should be rinsed off immediately, usually within a few minutes.
How long should kerosene be applied for lice? - in detail
Kerosene is not a medically approved agent for eliminating head‑lice infestations. Clinical guidelines and toxicology reports indicate that any exposure should be limited to the shortest time necessary to achieve a physical effect, typically no longer than a few seconds, followed by immediate removal and thorough washing. Prolonged contact increases the risk of skin irritation, chemical burns, respiratory distress, and systemic toxicity.
Key points for safe handling:
- Application time: Apply kerosene for no more than 5 seconds. After this brief period, rinse the scalp with warm water and a mild detergent.
- Quantity: Use only a thin layer sufficient to wet the hair; excess liquid raises absorption risk.
- Removal: Employ a fine‑toothed comb to extract lice and nits immediately after rinsing. Repeat the combing process at 24‑hour intervals for three days to catch any newly hatched insects.
- Precautions: Perform the procedure in a well‑ventilated area, wear gloves, and keep the substance away from eyes and mucous membranes. Do not apply to broken skin or irritated scalp.
- Medical supervision: Seek professional advice before using kerosene. Dermatologists and pediatricians recommend approved pediculicides (e.g., permethrin 1 % or dimethicone) because they have proven efficacy and safety profiles.
Risks associated with extended exposure:
- Dermatitis and chemical burns develop after a few minutes of contact.
- Inhalation of vapors can cause coughing, bronchospasm, or central nervous system depression.
- Systemic absorption may lead to nausea, dizziness, and in severe cases, hepatic or renal impairment.
Given the hazardous nature of kerosene, the consensus among health authorities is to avoid its use altogether. If a keroside-based remedy is chosen despite warnings, limit contact to the brief interval specified above, ensure immediate cleansing, and monitor for adverse reactions. For reliable eradication, rely on FDA‑approved treatments and follow the recommended repeat‑application schedule.