Tea tree oil is an effective natural treatment for head lice. It contains potent antibacterial and insecticidal properties that can kill head lice and their eggs. The document provides 8 methods for using tea tree oil to treat head lice, such as combining it with coconut oil, lavender oil, or vodka and applying it to the scalp. Tea tree oil products like shampoo are also recommended for treatment. When used regularly, tea tree oil can help eliminate head lice without harsh chemicals.