Organic Tea Tree Essential Oil is best known as a very powerful immune stimulant. It can help to fight all three categories of infectious organisms (bacteria, fungi, and viruses), 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, measles, sinusitis and viral infections. For skin and hair, Tea Tree has been used to combat acne, oily skin, head lice and dandruff.