With the application of sulfur ointment, pubic lice eggs may hatch. The main ingredients of sulfur ointment are sulfur and petroleum jelly, which is used for the treatment of scabies, ringworm, seborrheic dermatitis, etc. It has a killing effect on scabies and fungi, and can soften and dissolve keratin. However, it produces some irritation to the skin, and there may be irritation, itching and burning sensation after use. Pubic lice is a kind of parasite that can be parasitized on the hairs of pubic and anal parts of men and women. Pubic lice suck blood from the skin and bite the skin to produce intense itching symptoms, causing pubic lice disease, and usually the adult lice will lay their eggs in the patient’s pubic hairs and other parts of the body. The first step in treatment is to shave the hair and look for lice eggs. If you can not shave the hair, you should choose the insecticide that can kill both the pubic lice and the eggs, such as 0.3% pyrethrin, 3% piperonyl butoxide, etc. This insecticide has a killing effect on the pubic lice and the eggs by interfering with the function of the pubic lice ganglion to cause respiratory paralysis. Sulfur ointment also has the effect of killing pubic lice, but the drug is mainly through the petroleum jelly component of mechanical blockage of the respiratory apparatus of pubic lice, so that the pubic lice suffocate and die. The drug has a weaker effect on pubic lice eggs, which can still hatch from attached pubic hairs and other parts of the body and reappear as symptoms of pubic lice disease. Patients with pubic lice disease need to be treated together as husband and wife, the intimate apparel will be thoroughly cleaned and then killed, at the same time, the genital area of the pubic hair and the hair around the anus should be thoroughly removed at once, and then locally search for lice eggs, and finally use sulfur ointment to apply locally, usually a few days can be completely cured; it is important to note that shaved pubic hairs should be thoroughly destroyed. Sulfur ointment is best used under the guidance of a doctor to avoid adverse reactions.