Tea tree oil is an essential oil derived from the leaves of the Australian plant Melaleuca alternifolia. It has been widely studied for its antimicrobial and anti-inflammatory properties. Potential Benefits of Tea Tree Oil 1. May Help Treat Acne Tea tree oil can help reduce acne-causing bacteria and inflammation. Some studies have found that gels containing tea tree oil can improve mild to moderate acne, although results are usually slower than prescription treatments. 2. Has Antimicrobial Properties Tea tree oil has activity against certain bacteria, fungi, and viruses in laboratory studies. This is why it's commonly found in skin cleansers, foot sprays, and some oral-care products. 3. May Help with Athlete's Foot and Fungal Skin Infections Some evidence suggests tea tree oil may help relieve symptoms of athlete's foot and other superficial fungal infections, especially when used consistently. 4. Can Reduce Dandruff Shampoos containing tea tree oil may help decrease dandruff, scalp itching, and flaking in some people. 5. May Soothe Minor Skin Irritation Its anti-inflammatory effects may help reduce redness, swelling, and itching from minor skin irritations, though it can also irritate sensitive skin. 6. May Help with Nail Fungus Tea tree oil is sometimes used as a complementary treatment for mild nail fungus, though results are mixed and treatment often requires many months.