This potent antimicrobial oil is widely used to treat acne, burns, inflammation, and fungal infections. Tea tree oil helps unclog pores, eliminate bacteria, and reduce allergic skin reactions. Its antioxidant properties combat free radicals and support collagen production. Native to eastern Australia, tea tree leaves were traditionally crushed and inhaled to relieve colds and coughs. They were also used in infusions or as poultices to treat wounds and skin irritations.