Why do essential oils work for head lice prevention and treatment?
Head lice are attracted to us because of our distinctive human smell. Essential oils are very fragrant and their strong flavors hide our human smell and keeps lice away. Essential oils act as insect repellents, and this is why they help preventing head lice. Moreover, some of them, such as tea tree oil, have the properties of insecticides, and if you happen to still catch a louse, it will be killed by the oil.