Will pubic lice eggs fall off after applying sulfur ointment?

Generally, whether pubic lice eggs fall off after applying sulfur ointment depends on whether the ointment is used correctly. If sulfur ointment is applied properly, the eggs usually fall off; if used incorrectly, the eggs typically do not fall off. If discomfort occurs, it is recommended to seek medical attention promptly for professional evaluation and treatment under a doctor's guidance. The detailed analysis is as follows:

When sulfur ointment is used correctly, pubic lice eggs generally fall off after application. Sulfur ointment contains sulfur, which has certain insecticidal and antimicrobial effects, capable of killing adult lice and some eggs. After application, as the medication takes effect, adult lice are killed, and the eggs attached to hairs may become loosened due to the drug’s action, eventually falling off during routine cleaning.

If sulfur ointment is used improperly—for example, if all areas potentially harboring pubic lice are not adequately covered, or if the ointment is not applied at the recommended frequency and duration—this can reduce treatment effectiveness and may prevent the eggs from detaching.

During treatment, personal hygiene should be maintained: keep the affected area clean and dry, and avoid sharing towels, bed linens, or other personal items with others to prevent cross-infection.