Head lice infestation is a fairly common problem ... Even after treatment, viable eggs may hatch and young nymphs emerge. Isopropyl myristate (IPM) and cyclomethicone D5 do not have an effect ...

What are head lice? Head lice are tiny insects that infest the scalp, lay eggs and reproduce rapidly. They undergo three stages of development: egg (nit), nymph, and adult. One fertilized ...