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Tea Tree Oil: Benefits, Side Effects and Safety


Scientific name: Melaleuca alternifolia Also called: tea tree oil, tea tree, Australian tea tree oil, tea tree essential oil, melaleuca oil

Tea tree oil comes from the leaves of an Australian tree. People have used it for a long time to treat skin wounds. Today, it is sold as a product for your skin.

What is tea tree oil?

Tea tree oil comes from the leaves of a plant native to Australia. It is made by steaming the leaves. The oil is then sold for use on the skin.

It is not a drug approved by the U.S. Food and Drug Administration (FDA). Companies are responsible for the safety of their own products.

What are the benefits of tea tree oil?

There is a small amount of evidence that it may help with acne. It might also help with athlete’s foot, though it may not work as well as standard treatments.

For other uses, there is not enough evidence to know if it works. This includes nail fungus, head lice, and gum inflammation.

What are the side effects of tea tree oil?

Most people can use it on their skin without problems. Some people may get red or irritated skin.

This reaction is more likely if the product is old. It is also more likely if the oil was left in heat, light, or air.

Why should you never swallow tea tree oil?

Never swallow tea tree oil. Taking it by mouth can cause very serious symptoms.

These symptoms include confusion and being unsteady. It can also cause an inability to walk and even a coma.

Is there a standard dose?

There is no standard dose for tea tree oil. It is intended for use on the skin only. Always talk to your doctor about any products you use.

Does tea tree oil interact with medications?

The source does not name specific medicines that interact with tea tree oil. However, it warns that some herbs and medicines can interact in harmful ways.

Always tell your health care provider about any herbal products you use. They can help you make safe, informed decisions.

Common questions about tea tree oil

Can I use tea tree oil if I am pregnant?
Yes, tea tree oil products used on the skin may be safe during pregnancy and while breastfeeding.
Does it work for head lice?
It is unclear. It has only been tested when mixed with other ingredients, so we do not know if the oil itself helps.
Is it safe to use in a mouthrinse?
Some mouthrinses contain it, but their effectiveness is uncertain. If you use one, you must not swallow it.
This page is for education only. It is not medical advice, and it is not a recommendation to take tea tree oil. Natural Medical Solutions Wellness Center does not diagnose, treat, or cure. Supplements can affect how your medicines work. Talk with your doctor and your pharmacist before you start, stop, or change any supplement, and keep working with the providers you already see.

Where this information comes from

Written from NCCIH, a public-domain resource from the U.S. National Institutes of Health. Information retrieved 2026-08-21.

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