Historically, people drank a tea made from tea tree oil to access its health benefits, like treating skin infections, cuts, wounds, and even scurvy (it's important to note that ingestion of tea tree oil is not recommended as it can be poisonous). Because this traditional medicine is a natural antifungal, anti-inflammatory, antibacterial, and antiseptic, it can treat athlete's foot, contact dermatitis, dry skin, and even active acne breakouts.
Today, tea tree essential oil is generally topically applied to the skin or inhaled through the mouth and nose. When used topically, tea tree essential oil is often diluted and applied to the skin or scalp. Application can reduce swelling, treat dandruff and lice, and kill bacteria.
Why does natural tea tree oil work to treat acne vulgaris? Acne is caused by chronic inflammation of the skin—in fact, it's considered to be a skin disease in cases that span larger than a few occasional pimples. The way our skin counters this disease is with visible, red, inflamed spots that we know as "acne." However, because tea tree oil reduces this chronic inflammation, the development of acne is prevented.
Some facial acne lesions aren't caused by inflammation, they're caused by clogged pores in the face. When there's an overproduction of oil in the sebaceous glands or dirt or dead skin cells become lodged in the pores, the immune system reacts by developing pimples—that's why people with oily skin often struggle with frequent acne. Pores clogged with bacteria, dirt, and dead skin cells are sterilized by tea tree's antiseptic qualities, another way tea tree reduces acne.
Finally, tea tree not only kills the acne-causing bacteria and reduces the inflammation, but it moisturizes and hydrates the skin after treatment.
In short, tea tree oil is an all-in-one, natural product that reduces acne spots while simultaneously healing and moisturizing the skin.