Tea Tree Essential Oil is best known as a very powerful immune stimulant. It can help to fight all categories of infectious organisms (bacteria, fungi, etc), and there is evidence that Tea Tree Oil massages prior to an operation may help to fortify the body and reduce post-operative shock. Used in vapor therapy, Tea Tree Oil can help with colds and sinusitis. For skin and hair, Tea Tree has been used to combat acne, oily skin, head lice and dandruff. As essential oils have become more accepted by the public, the use of Tea Tree has increased significantly. This can be readily evidenced by the commercial products now using Tea Tree Essential Oil.