Tea tree oil has its origin in Australia, this oil is mainly used to treat Athleteâ??s foot, acne and mixed in small quantities with medicineâ??s to cure insect bites. The oxidized tea tree oils should not be used without proper knowledge. The oral intake of the oil can cause coma, diarrhea, vomiting and body weakness. So the oxidized form of this oil is avoided and diluted form is used in most cases. It is also used in the treatment of fungal and bacterial infections.