Tea tree oil good for pimples & It is also known as Melaleuca oil, this Australian herbal remedy is an excellent cure. Tea tree oil for pimples can shrink acne overnight! Let’s find out how and why this remedy work Tea tree oil is a potent and volatile essential oil derived from an Australian native plant. It is used mainly for antimicrobial propertieswhich is why tea tree oil for pimples works well. For those wondering, “Is tea tree oil good for pimples”, the answer is that its topical formulation can cure cutaneous infections, including acne vulgaris. The reason why this herbal oil works wonders for warding off acne is its unique composition. It is composed of terpene hydrocarbons, like monoterpenes, and associated alcohols like sesquiterpenes. These substances are aromatic, volatile isoprene polymer hydrocarbons.