Hair dye kills live head lice, but it does not kill lice eggs according to simpleheadlicesolutions.com. This means the cycle of infestation is likely to continue until the individual uses the proper method for eliminating head lice.
The best way to kill head lice and lice eggs is to use an over-the-counter treatment shampoo specially formulated to kill both the living lice and their eggs. For these products to work, an individual must carefully follow the instructions and continue to check for eggs and lice for up to 10 days after applying the treatment, according to kidshealth.org. Most treatment packages include small fine-tooth combs to help with this process. If any lice or eggs are present, additional treatment is necessary.