The health benefits of tea tree oil can be attributed to its antibacterial, antimicrobial, antiseptic, antiviral, balsamic, expectorant, fungicide, insecticide, and stimulant factors.
The thing that makes this oil work is its composition. Though the oil is made up of over a 100 components, its major constituents include terpene hydrocarbons – monoterpenes, sesquiterpenes, and their respective alcohols. Terpinen-4-ol is a major component, as we already saw. Another component called 1,8-cineole could be responsible for the adverse reactions tea tree oil might cause.