Head lice are usually formed by lice parasites on the scalp of the patient. In order to eliminate them completely, shaving the hair, applying medication externally and disinfecting personal belongings can be carried out in several ways. 1. Shave the hair: shaving the hair can make the lice lose their parasitic environment, so as to achieve the purpose of completely eliminating the lice and eggs. 2. Topical application of medication: patients can apply 50% tincture of Hymenococcus or 25% benzyl benzoate emulsion to the hair, and also use hot water and soap to wash the hair. 3. Sterilization of intimate items: Patients need to sterilize intimate items on the head, such as pillowcases, hats, and towels, in order to prevent recurrence of the infection. For patients with head lice, it is recommended to go to the regular hospital in time, under the guidance of professional doctors for symptomatic treatment. The medication should be used in accordance with the doctor’s instructions.