Sulfur ointment can be used for lice at the root of pubic hair in men. Men with lice growing at the root of their pubic hair are considered to have pubic lice, which is a parasitic infection. The main ingredient of sulfur ointment is sublimated sulfur, which is suitable for scabies, ringworm, acne, seborrheic dermatitis, rosacea, simple furuncle, and chronic eczema, and also has some therapeutic effect on pubic lice. When sulfur comes into contact with skin and tissue secretions, it produces hydrogen sulfide and even pentasulfuric acid, which can act as an insecticide. Sulfur ointment may have some adverse reactions, such as skin irritation, itching and burning sensation, etc. The concentration of this drug is high, and contact with the eyes and other mucous membranes should be avoided, if burning sensation, redness and swelling occurs it should be discontinued immediately, and it is prohibited for those who are allergic to this product, and allergic individuals should be cautious in using it. If you need to use the drug, it is recommended to use the drug under the guidance of a doctor, not blindly self-medication, in order to avoid adverse effects.