Lice are parasites that live on the scalp, clothes, vulva, etc. When there are lice on the head, they can be removed by shaving the head, but when the condition is serious, medication is required. Lice take human blood and body fluids as their main food, itching when they bite and an ant-like sensation when they crawl, and are often parasitic on the scalp, vulva and other parts of the body. If there are not many head lice, they can be removed by shaving the head; if there are too many head lice, they can be treated with drugs such as pyrethroids and paracetamol on top of shaving the hair. In addition, during the treatment period, patients should restrict going out and move appropriately within a small area to avoid causing infection to others, and used items, such as combs and head scarves, should be sterilized in time.