It has many external uses as an essential oil
Tea tree oil has been recognized as a potent antiseptic in Australia anecdotally for many years, but has been scientifically investigated only relatively recently. Recent studies support a role for the topical application of tea tree oil in skin care and for the treatment of various diseases and conditions. Tea tree oil appears to be effective against bacteria, viruses, fungal infections, mites such as scabies, and lice such as head lice.
Tea tree oil has activity against the bacteria staphylococcus aureus including MRSA.