Tea tree oil is a popular choice for treating acne because of its anti-inflammatory and antimicrobial properties. It's thought to calm redness, swelling, and inflammation. It helps to prevent and reduce acne scars, leaving you with smooth, clear skin. Due to its antibacterial and anti-inflammatory properties, Tea tree oil may help treat acne. As a result of its anti-inflammatory effects, tea tree oil may also help reduce itchy skin.