Tea Tree Oil

Acne Treatment

Tea tree oil is one of the most well-studied natural remedies for acne. A landmark study published in the Medical Journal of Australia compared 5% tea tree oil gel with 5% benzoyl peroxide lotion and found that both were effective at reducing acne lesions, though tea tree oil produced fewer side effects such as dryness, stinging, and peeling.

The key active compound, terpinen-4-ol, is believed to be responsible for tea tree oil's antimicrobial activity against Cutibacterium acnes (formerly Propionibacterium acnes), the bacterium most commonly associated with acne breakouts.

Antifungal Properties

Tea tree oil has demonstrated strong antifungal activity in numerous laboratory and clinical studies. Research published in the Journal of Antimicrobial Chemotherapy found it effective against Trichophyton rubrum, the fungus responsible for athlete's foot and nail fungus. A clinical trial showed that 25% and 50% tea tree oil solutions improved symptoms of tinea pedis (athlete's foot) significantly compared to placebo.

Wound Care & Antiseptic

Tea tree oil has a long history of use as a natural antiseptic for minor cuts, scrapes, and abrasions. Research suggests that terpinen-4-ol may help reduce bacterial load in wounds and support the natural healing process. It has been used in clinical settings as an adjunct to conventional wound care for its broad-spectrum antimicrobial properties.

Dandruff & Scalp Health

A randomised, single-blind clinical trial published in the Journal of the American Academy of Dermatology found that a 5% tea tree oil shampoo significantly improved the severity of dandruff compared to placebo. Tea tree oil's antifungal properties may help address Malassezia, a yeast-like fungus commonly associated with dandruff and seborrhoeic dermatitis.

Household Disinfectant

Studies have demonstrated that tea tree oil is effective at killing a broad range of household bacteria and fungi, including mould. When added to cleaning products, it may help disinfect surfaces naturally without harsh chemicals. Its fresh, medicinal scent also serves as a natural deodoriser.

Spot Treatment for Acne

Apply a small amount of diluted tea tree oil directly to blemishes using a cotton swab. Use a 5% concentration — approximately 1–2 drops of tea tree oil mixed into 20 drops of a lightweight carrier oil such as jojoba or rosehip oil. Apply once or twice daily after cleansing. Consistent use over 4–8 weeks may show noticeable improvement.

Scalp Treatment for Dandruff

Add 5–10 drops of tea tree oil to your regular shampoo bottle (250 ml) and shake well. Alternatively, massage 2–3 drops mixed with a tablespoon of carrier oil directly into the scalp before shampooing. Leave on for 5 minutes to allow the oil to work before rinsing thoroughly.

Natural Deodorant

Tea tree oil's antibacterial properties may help neutralise odour-causing bacteria. Mix 5 drops with 30 ml of witch hazel in a small spray bottle for a simple, natural deodorant spray. You can add 3 drops of lavender for a more pleasant scent. Shake well before each use.

Mould Removal

Tea tree oil is one of the most effective natural agents for tackling household mould. Add 2 teaspoons of tea tree oil to 500 ml of water in a spray bottle. Spray onto mouldy surfaces (bathroom tiles, shower curtains, window frames) and leave without rinsing. The scent fades within a few days, and the mould should not return as quickly.

Minor Wound Cleaning

For small cuts and scrapes, clean the wound first with water. Then apply a drop of tea tree oil diluted in a teaspoon of carrier oil to the area. Cover with a clean bandage. The antiseptic properties may help keep the wound clean during healing. Discontinue use if irritation occurs.

Nail Fungus Treatment

Apply 1–2 drops of tea tree oil (undiluted or at 50% concentration in a carrier oil) directly to the affected nail twice daily using a cotton swab. Be consistent — nail fungus is slow to respond and treatment may require 3–6 months. Research suggests tea tree oil may help improve the appearance of affected nails over time.

Topical Application

For most skin applications, dilute tea tree oil to a 2–5% concentration. A 5% dilution is approximately 30 drops per 30 ml of carrier oil. For sensitive skin or first-time users, start at 2% (12 drops per 30 ml). Jojoba oil is an excellent carrier oil choice as it closely resembles the skin's natural sebum.

Diffuser

Add 3–5 drops of tea tree oil to your diffuser to help purify the air and create a clean-smelling environment. Tea tree oil blends well with eucalyptus, lemon, and lavender oils. Diffuse in 30–60 minute intervals in a well-ventilated space.

In Skin Care Products

You can add tea tree oil to your existing unscented face wash, moisturiser, or body lotion. Use approximately 1–2 drops per 30 ml of product. Mix thoroughly before each use. This is an easy way to incorporate tea tree oil into your daily skin care routine without preparing separate dilutions.

Foot Soak

For athlete's foot or general foot hygiene, add 5–8 drops of tea tree oil to a basin of warm water along with a cup of Epsom salt. Soak your feet for 15–20 minutes. Dry thoroughly afterwards, paying attention to the areas between your toes. Repeat 2–3 times per week.

Internal Use

Never ingest tea tree oil. Tea tree oil is toxic when swallowed and can cause confusion, loss of muscle coordination, and in severe cases, coma. There is no safe oral dose for tea tree oil. Keep it stored securely away from children.

Skin Sensitivity

Tea tree oil can cause contact dermatitis in some individuals, particularly when used undiluted or at high concentrations. Oxidised tea tree oil (old or improperly stored oil) is significantly more likely to cause allergic reactions. Store in a cool, dark place in a tightly sealed dark glass bottle and discard after 1–2 years.

Pets

Tea tree oil is toxic to cats and dogs. Even small amounts can cause vomiting, tremors, difficulty walking, and lethargy in pets. Never apply tea tree oil to your pet's skin, and avoid diffusing in enclosed spaces where pets are present. If your pet is exposed, contact your veterinarian immediately.

Pregnancy & Breastfeeding

There is limited research on tea tree oil use during pregnancy and breastfeeding. While topical use in low concentrations is generally considered low-risk, it is advisable to consult your healthcare provider before use. Avoid application to the chest area while breastfeeding.

Dilution Is Essential

Applying undiluted tea tree oil to the skin can cause redness, itching, blistering, or chemical burns. Always dilute in a carrier oil before topical application. For facial use, a 2% dilution is generally recommended; for body use, up to 5% is typically well tolerated by most adults.

Tea Tree Acne Spot Treatment

Ingredients:

• 2 drops tea tree essential oil
• 20 drops jojoba oil (or rosehip seed oil)
• 1 small dark glass roller bottle (10 ml)

Instructions:

• Add the jojoba oil to the roller bottle.
• Add the tea tree oil.
• Secure the roller top and shake gently to mix.
• Roll onto blemishes after cleansing, morning and night.
• Allow to absorb before applying moisturiser.

This gives approximately a 5% dilution, consistent with the concentration used in clinical studies. Use within 6 months for best results.

Anti-Dandruff Scalp Treatment

Ingredients:

• 3 drops tea tree essential oil
• 2 drops lavender essential oil
• 1 tablespoon coconut oil (warmed to liquid)

Instructions:

• Warm the coconut oil until liquid (avoid overheating).
• Add the essential oils and stir gently.
• Massage into the scalp using your fingertips for 3–5 minutes.
• Leave on for at least 20 minutes (or overnight with a towel on the pillow).
• Shampoo out thoroughly — you may need two washes to remove the coconut oil.

Use once or twice a week for 4–6 weeks to see improvement. Discontinue if any scalp irritation occurs.

Natural Mould-Removal Spray

Ingredients:

• 2 teaspoons tea tree essential oil
• 500 ml water
• 1 glass spray bottle

Instructions:

• Add the water to the spray bottle.
• Add the tea tree oil.
• Shake vigorously before each use (oil and water will separate).
• Spray liberally onto mouldy surfaces.
• Do not rinse — allow to dry naturally.

The strong tea tree scent will fade within 1–2 days. Reapply weekly to prevent mould from returning in damp areas.