How To Use Tea Tree Oil for Acne Healing….. Tea tree oil is made by steam distilling the leaves of the tea tree, which is native to Australia. It is used to for a number of things, including bad breath, athlete’s foot, cold sores, body odor and even acne. Tea tree oil is hands down the most effective natural remedy I’ve ever tried for acne. Some find tea tree oil to be irritating, so do a skin test before applying it directly to the face. The...