Tea Tree Essential Oil: A Natural Alternative to Fight Infections and Boost Immunity

What Is Tea Tree Oil, and How Does It Work?

Tea tree oil, also known as melaleuca oil, is an essential oil steam-distilled from the leaves of Melaleuca alternifolia, a narrow-leafed paperbark tree native to the Bungawalbin Valley and surrounding wetlands of northern New South Wales.

Its antifungal, antiviral, and antibacterial properties come primarily from terpinen-4-ol, the dominant compound in the oil and the one responsible for most of its antimicrobial activity. Applied topically, tea tree oil has documented effectiveness against fungal infections such as athlete’s foot, ringworm, and nail fungus; against viral skin conditions like cold sores and warts; and against bacteria including Staphylococcus aureus and Escherichia coli. Researchers believe it works by disrupting the cell membranes of bacteria and fungi and by interfering with viral replication, while also reducing the inflammation, redness, and swelling that accompany infection.

Bulam: The Bundjalung Knowledge Behind the Bottle

According to Bundjalung oral tradition, the plant’s medicinal reputation traces to swampy “healing lakes” in the Bungawalbin Valley where fallen tea tree leaves would collect and darken the water. Bundjalung people crushed the leaves and inhaled the released oils to treat upper respiratory infections, and made infusions and leaf poultices to treat wounds and skin conditions — a body of practical, tested knowledge that predates any laboratory by an unknown but almost certainly long span of generations. The plant itself carries a name in that knowledge system: Bulam.

European documentation begins in 1770, when Lieutenant James Cook’s crew brewed the aromatic leaves into a spicy tea during their voyage along the Australian coast — the origin of the English name “tea tree,” a name that erases the plant’s prior one. For more than a century after that, the knowledge stayed where it had always lived: with Bundjalung communities. The shift to commercial extraction came later, and it came through dispossession. In the 1890s, Bundjalung families relocated from Coraki to the Cabbage Tree Island mission found themselves harvesting paperbark tea trees for a settler-run distillery — the moment Aboriginal ecological knowledge of Bulam became, for the first time, someone else’s raw material and someone else’s profit.

The modern industry dates to the 1920s, when Australian government chemist Arthur Penfold tested the germicidal properties of native essential oils and identified tea tree oil as unusually potent. His research, and a 1930 report in the Medical Journal of Australia confirming it, launched tea tree oil as a commercial antiseptic; by the World War II era it was a familiar item in Australian first-aid supplies. Penfold is remembered as the founder of an industry. The Bundjalung knowledge that made the plant worth testing in the first place rarely gets remembered at all.

The Pattern That Repeats: Patents and Erasure

This is not a closed chapter of history. Australian Indigenous communities are still fighting, in real time, to have their knowledge of native plant medicines legally recognized as theirs. Kakadu plum and gumbi gumbi — two bush medicines with deep Aboriginal use histories — have both faced patent and trademark applications from outside companies attempting to claim commercial monopolies over them; Indigenous-led legal challenges, grounded in evidence of prior use, have pushed some of those applications back.

A 2020 Federal Court case, Hood v Bush Pharmacy Pty Ltd, shows why those fights are so hard to win. The case concerned a patent on essential oil from Kunzea ambigua — a different native Australian shrub, not tea tree itself — but the court’s reasoning exposes the same bind Bundjalung knowledge holders face. The judgment upheld the patent in part because there was “no specific evidence” of Aboriginal peoples extracting that particular oil in that particular way, even while acknowledging that “much of the knowledge and practices of Australian Aboriginal people is unrecorded and is passed on by oral tradition.” Patent law rewards documentation. Oral tradition, by design, does not produce the kind of paper trail patent law asks for. That gap is not neutral — it is the same gap that let a settler distillery harvest Bulam a century ago without ever having to name where the knowledge came from.

Scholars studying Bundjalung country are working to close that gap by naming it plainly: a recent academic study, Garihma (to Care for): Examining Recent Media Coverage of Bulam (Tea Tree) through a Cultural Lens, examines how contemporary reporting on tea tree oil still routinely omits the Bundjalung relationship to Bulam — garihma being the Bundjalung word for the ongoing act of caring for something. Ubuntu Village believes that naming the actual knowledge-holders is not a courtesy footnote to plant medicine. It is part of the medicine itself, and part of the same justice work that runs through everything we do — the same principle behind honoring the ancestral roots of every remedy we write about, whether it began in the Bungawalbin Valley, West Africa, or the Caribbean.

The Benefits of Using Tea Tree Oil

Used correctly, tea tree oil offers real, well-documented benefits. As an antibacterial agent, it can help cleanse and disinfect minor cuts, scrapes, and blemish-prone skin, supporting faster healing. As an antiviral, it can help shorten outbreaks of cold sores and warts. As an antifungal, it remains one of the most reliable natural options for athlete’s foot, ringworm, and nail fungus. Its anti-inflammatory action can also soothe the redness and irritation that accompany conditions like eczema and mild psoriasis, and some evidence suggests it supports the body’s own immune response to pathogens.

How to Use Tea Tree Oil Safely

Tea tree oil is potent, and it should always be diluted in a carrier oil, such as coconut or almond oil, before it touches skin — undiluted application can cause redness or a burning sensation. Do a patch test on a small area and wait 24 hours before wider use. For topical infections, a few diluted drops applied directly to the affected area is the most common approach. For respiratory congestion, a few drops in a bowl of hot water, inhaled as steam for five to ten minutes, can help clear the airways. Diffusing it in a room, or adding a few drops to a homemade all-purpose cleaning spray, are gentler, ambient ways to use its antimicrobial properties around the house.

Tea tree oil should never be swallowed — ingestion can cause confusion, loss of coordination, and decreased consciousness — and it should be kept well out of reach of children and pets. If you have sensitive skin, are pregnant, or are uncertain about interactions with any condition or medication, a conversation with a healthcare professional or clinical aromatherapist is worth having before you begin.

If someone in your life reaches for tea tree oil without knowing where it came from, this one is for them. Share it.

---

Sources & Research

1. Tea Tree Oil: Description, Uses, Extraction, History & Side Effects — Encyclopædia Britannica
2. Ti Tree Oil, an Ancient Bundjalung Medicine — Matt Poll
3. Case Note: Hood v Bush Pharmacy Pty Ltd (2020) FCA 1686 — Gestalt Law
4. Protecting Indigenous Bush Foods and Medicines Against Biopiracy — UNSW Newsroom
5. Garihma (to Care for): Examining Recent Media Coverage of Bulam (Tea Tree) through a Cultural Lens — M/C Journal
6. Tea Tree Oil — Mayo Clinic
7. 14 Benefits and Uses for Tea Tree Oil — Healthline
8. Tea Tree Oil: What It Is, Benefits and Side Effects — Forbes Health

Related Reading

• ‣ The Body Keeps the Ancestors
• ‣ Spirituality Was Never a Personal Journey. Here Is What African Ancestral Traditions Have Always Known.
• ‣ What Forest Networks Teach Us About Community
• ‣ Mirror Neurons and Communal Healing