Fleas in the hair is the presence of head lice in the hair, with red spots and pimples on the lice bites, intense itching and contagious. It is contagious. It can be eliminated by general treatment and medication. 1. General treatment: head lice patients should shave their heads and apply medication, female patients should use dense grates to grate lice and nits, wash their heads with hot water and soap, and thoroughly disinfect used combs, grates, hats, head scarves and pillowcases. The patient should be examined and treated for direct contact with the patient at the same time. 2. Topical medication: 50% tincture of Parthenium, 25% benzyl benzoate emulsion can be used externally to apply all over the hair and scalp and other parts of the body. If there are fleas and head lice in the hair, it is necessary to go to the hospital in time for treatment under the guidance of medical professionals in order to eliminate head lice.