Tea tree oil and acne: what Healthline says

Reviewed October 17, 2026

The short answer

The oil comes from the leaves of an Australian tree. Healthline says the research suggests it might help mild to moderate acne, but it is not a cure-all, and the evidence is not of the best quality. It can irritate skin or cause an allergic reaction.

What the research covers

Healthline cites a 2015 review covering 35 studies of complementary acne treatments; it found some support for the oil, with a caveat about quality. It also describes a 2017 study in which people applied the oil twice a day for 12 weeks and the researchers reported meaningful improvement in acne ranging from mild to moderate, without serious side effects. Healthline points out that only 14 people took part and the study did not meet other research quality standards.

How it compares

Healthline says the oil may be less effective than salicylic acid and benzoyl peroxide, and suggests it as an over-the-counter option for people who are sensitive to those two.

Safety cautions from the source

• Healthline: do not swallow it; swallowing it can lead to serious problems such as confusion and loss of muscle coordination.
• Healthline: keep it out of your eyes, where it can leave them red and irritated.
• Healthline: used diluted, most people have no serious problem, but some get an allergic reaction or irritation where it was applied, so test a small patch of skin first.
• Healthline: stop at once on noticing itching, redness, swelling or irritation.
• Healthline also warns that any added oil on the face can make acne worse.

How to read it on a label

US cosmetic labels generally list ingredients in descending order of amount, but anything at 1% or less can appear in any order after those above 1%. Its position does not tell you the exact concentration. Judge the whole product, how it feels on your skin, and what changes when you add or drop it.

What not to conclude

This page does not say tea tree oil will clear acne or is gentle enough for every skin. The studies are small and low in quality by Healthline's own account. If you are pregnant, or acne is painful, scarring or not improving, ask a doctor or dermatologist.