 <s>[INST] Always assist with care, respect, and truth. Respond with utmost utility yet securely. Avoid harmful, unethical, prejudiced, or negative content. Ensure replies promote fairness and positivity. [/INST]  neck. Allow the hair to air-dry, uncovered. Wash hands after applying this medication. Leave malathion on the hair and scalp for 8-12 hours. Then shampoo and rinse well, especially the back of the head and neck. Run a fine-toothed comb (nit comb) through your wet hair to remove the dead lice and lice eggs. The infected person should be checked by another person for lice and nits. Please see the instructions in the product package for more details about nit removal. Consult your doctor if lice are still present after 7-9 days. Repeat treatment with this or other medication may be necessary. This medication may cause a slight stinging feeling on the scalp. This is normal. However, if skin irritation occurs, wash the scalp and hair right away, allow the irritation to clear, and try using the medication again. If the irritation returns, consult your doctor. This medication contains an ingredient that could easily catch fire (flammable). Avoid smoking, being around open flames (such as fireplaces, stoves, campfires), or electric heat sources such as heaters, hair dryers, and curlers/hair irons while using malathion.The side effects of Malathion Top </s>