The scabies can be killed by using sulfur ointment correctly for about three days in general. Scabies is caused by the scabies mite parasitic on the human body, and the mite is parasitic on thin and tender parts of the skin, such as the fingers, external genitalia, armpits, and inner thighs, and is usually manifested as papules and blisters, and itching is intense, especially at night. The reason why sulfur ointment can treat scabies is that the sublimated sulfur in sulfur ointment produces hydrogen sulfide and pentachlorosulfonic acid when it comes in contact with skin tissue, which has a certain toxicity, and it can completely kill scabies mites after about three days of regular and correct use. Treatment of scabies, sulfur ointment needs to be applied externally to the skin of the whole body below the neck, especially at the skin folds, while intimate clothing and bed sheets and covers need to be ironed and exposed to the sun. The living environment needs to be disinfected with insecticide. Since sulfur itself has a certain irritation, if scabies is not completely cured after three days of continuous use, it is recommended to stop using it for three days and then continue a course of topical application.