The patient is likely to have ### Hair Disease: Head Lice ### Disease Description: Head lice are tiny insects that live on the scalp, feeding on human blood. They lay eggs, known as nits, at the base of the hair shaft. ### Severity of Disease: Severe The patient should use ### Medication: Malathion ### Medication Description: Malathion is an organophosphate insecticide used for the treatment of head lice. It works by inhibiting cholinesterase activity in the louse, leading to excess acetylcholine at the nerve endings. ### Duration: 14 days ### Side Effects: Skin irritation, Burning sensation, Dry skin