Are there any side effects from using chemical treatments for head lice?

There are no over-the-counter or prescription treatments to kill lice that are totally safe and scientifically proven to be 100% effective against head lice and nits. These treatments are potentially harmful pesticides and reliance on them promotes repeated use and contributes to ongoing infestations, outbreaks and resistant strains of head lice. Manual removal of the live lice and nits is the safe alternative and a necessary component of any head lice treatment regimen. Although the FDA requires testing for safety before they give their approval to any product, individuals have unique vulnerabilities that must be considered before any treatment. Some individuals may be more vulnerable to side effects and should avoid chemical lice treatments for use on themselves or applying them to others. Some treatments may cause an itching or a mild burning sensation caused by inflammation of the skin on the scalp. Most products used to treat head lice are pesticides that can be absorbed through the skin.