Melaleuca alternifolia, commonly known as tea tree, is an aromatic evergreen tree in the family Myrtaceae native to the humid coastal regions of eastern Australia, growing in warm and swampy subtropical climates. The steam-distilled essential oil has a sharp, penetrating, camphoraceous aroma and a pungent, cooling taste. Tea tree oil is known for its antimicrobial, anti-inflammatory, antiseptic properties, primarily attributed to its terpinen-4-ol along with gamma-terpinene, alpha-terpinene, and other monoterpenes. Clinically, it is applied topically to treat acne vulgaris, tinea pedis, onychomycosis, dandruff, and minor bacterial infections of the skin. A randomized, double-blind trial demonstrated that 5% tea tree oil gel significantly reduced acne lesion counts and severity compared with placebo, thereby supporting its effectiveness for mild-to-moderate acne PMID: 17314442. Traditionally, the Australian Aboriginal communities crushed tea tree leaves and applied them to wounds and infections. And, during World War II, tea tree oil was issued to Australian soldiers as part of their field medical kits, reflecting its longstanding reputation as a natural antiseptic.