Lice live off blood and on specific parts of the body, depending on their species (head lice, body lice, public lice). Lice are spread through body contact or by the sharing of bedclothes and other garments or hair accessories. They secrete local toxins that lead to pruritus.

History/PE:- Patients with lice often experience severe pruritus, and 2° bacterial infection of the excoriations is at risk. - Body lice are seen in people with inadequate hygiene or in those with crowded living coniditions. Public lice contain anticoagulant in their saliva, so their bites often turn blue.

Diagnosis: Lice and their eggs (nits) can be seen with the naked eye.

Treatment:- Head lice: Topical permethrin, pyrethrin, benzyl alcohol, and mechanical removal.- Body lice: Wash body, clothes, and bedding thoroughly.- Public lice: Treat with the same medications as for head lice.