What kills nits in hair refers to treatments or products that eliminate nits, the eggs of head lice, from hair. Head lice are tiny insects that feed on human blood and can cause itching, irritation, and scalp soreness. Nits are small, oval-shaped eggs that are attached to the base of hair shafts.
Effective nit treatment options include over-the-counter and prescription medications, as well as home remedies such as combing with a nit comb and applying certain essential oils. Historically, using vinegar to dissolve the glue that holds nits to hair has been a popular home remedy.