Australia has the highest rate of skin cancer in the world. It also has some of the most intense UV radiation — influenced by the ozone layer, latitude, clean atmosphere and proximity to Antarctica. The combination makes sunburn a near-universal experience for Australians, and the question of how to treat it well is more interesting than it might first appear.
Sunburn is an inflammatory response, not a thermal burn. When UV radiation exceeds the skin's protective capacity — overwhelming melanin and damaging DNA in skin cells — the immune system mounts a response: blood vessels dilate, inflammatory mediators flood the area, and the characteristic redness, heat, pain and swelling develop over the following hours. The treatment of sunburn is fundamentally the treatment of skin inflammation, and several native Australian plants with anti-inflammatory properties are genuinely relevant.
Prevention First
The most effective remedy for sunburn is not getting sunburned. SPF 50+ broad-spectrum sunscreen, reapplied every two hours and after swimming or sweating, reduces UV penetration by approximately 98% when applied at the standard thickness of 2mg per cm². Protective clothing — including the iconic Australian broad-brimmed hat — UPF-rated swimwear, and shade-seeking behaviour between 10am and 3pm reduce burn risk significantly. The reason Australians know all of this and still get sunburned regularly is human nature. So — natural remedy time.
Cold Treatment: The Most Effective Immediate Response
Before any botanical remedy, the most evidence-supported first response to sunburn is cold application — a cool wet cloth, cold compress, or cool shower applied to the burned area. Cold reduces histamine release, constricts blood vessels to reduce inflammatory mediator delivery to the site, and directly reduces the activity of nerve receptors mediating pain. This works. It does not require any native plant knowledge, and it is the single most effective immediate response available.
Avoid ice directly on sunburned skin — ice can cause ice burns on already-compromised skin. Cool (not freezing) water or cool compresses are appropriate. Spend 10–15 minutes cooling the area before applying any topical product.
Aloe Vera: The Best-Evidenced Natural Sunburn Remedy
Aloe vera is not a native Australian plant — it originated in the Arabian Peninsula — but it is the natural sunburn remedy with the strongest evidence base, widely grown across Australia. Its gel contains compounds including acemannan and various phenolic compounds that have demonstrated anti-inflammatory, wound-healing and cooling properties in multiple controlled studies. A systematic review of controlled trials found significantly shorter healing time for burn wounds treated with aloe compared to controls. For sunburn, pure aloe vera gel — ideally from a plant rather than a processed product with added alcohol or fragrance — applied generously and reapplied every few hours is one of the most practical and effective first-line treatments available. Grow a plant if you can; the fresh gel from a leaf is superior to most commercial preparations.
Quandong: Traditional Cooling and Anti-Inflammatory Use
Quandong (Santalum acuminatum) has documented traditional use for skin irritation and inflammation in arid Australia. Leaves and fruit were applied to skin conditions, and the plant's high antioxidant phenolic content provides biological plausibility for anti-inflammatory activity at the skin surface. Contemporary quandong extract in skincare is most practically relevant as an ingredient in after-sun or soothing products. Several Australian native skincare brands include quandong extract in formulations specifically designed for sun-stressed or reactive skin. The research on quandong specifically for sunburn is limited, but its antioxidant and anti-inflammatory chemistry is appropriate for the application.
Kakadu Plum: Antioxidant Support for UV-Damaged Skin
After sunburn, the skin is flooded with reactive oxygen species — free radicals generated by UV damage and the subsequent inflammatory response. Antioxidant compounds can help neutralise these before they cause additional cellular damage. Kakadu plum's extraordinary antioxidant capacity — driven by Vitamin C, gallic acid and ellagic acid — makes it a logical choice for post-sun skin support.
This is best delivered in a formulated product — a serum, gel or moisturiser containing Kakadu plum extract — rather than raw fruit applied to burned skin. The Vitamin C and acid content of undiluted Kakadu plum could be irritating on already inflamed skin. A formulated, pH-appropriate product allows the antioxidant benefits without the irritation risk.
Saltbush: Traditional Skin Soothing
Several species of saltbush (Atriplex) have documented traditional use for skin irritation and inflammation in Aboriginal communities across Australia's interior and coastal regions. Contemporary research has identified antioxidant compounds including flavonoids in saltbush leaf extracts, consistent with anti-inflammatory applications. Fresh saltbush is available across most of Australia — it is one of the most widespread native shrubs in the country — making it one of the few traditional remedies practically accessible to people in regional and rural areas without specialist stores. A simple cool infusion (leaves steeped in cool water for 20–30 minutes) applied to burned skin as a compress is a practical, low-risk application consistent with traditional use.
Macadamia and Emu Oil: For the Recovery Phase
In the days following sunburn — once the acute inflammatory phase has passed and the drying, peeling stage begins — rich emollient oils become relevant. Sunburned skin loses barrier function and dehydrates rapidly. Keeping the recovering skin moisturised reduces peeling, supports cell turnover and reduces the discomfort of tight, dry post-burn skin.
Macadamia oil's palmitoleic acid content and excellent skin absorption make it one of the better emollient choices for this phase. Emu oil, with its documented anti-inflammatory properties and excellent skin penetration, is particularly useful if the burned area remains inflamed after the first 48 hours. Apply generously at least twice daily. Avoid fragranced products or those containing alcohol on burned or recently burned skin, as both can cause significant irritation on compromised skin.
What Not to Do
Butter or thick oil immediately after sunburn. Occlusive products applied in the acute inflammatory phase trap heat in the skin and can worsen the burn. Oils are for the recovery phase, not the immediate treatment.
Ice directly on skin. Ice burns can occur on already-compromised skin. Cool compresses, not ice.
Toothpaste or vinegar. These popular folk remedies persist in popular belief and cause nothing useful — both are potentially irritating on burned skin.
When to See a Doctor
Severe sunburn — covering a large proportion of the body, accompanied by blistering, fever above 38°C, chills, nausea or severe pain — warrants medical assessment. These presentations can involve dehydration and systemic effects beyond what home management addresses. Children with any significant sunburn should be seen by a doctor. Beyond the immediate sunburn, it is worth taking seriously the long-term implications: every significant sunburn increases cumulative UV damage and future skin cancer risk. If you have not had a skin check with a GP or dermatologist recently, a sunburn is a reasonable prompt to make one.
A Practical Post-Sunburn Plan
Immediately: cool shower or cool compresses. Hydrate well — sunburn causes significant fluid loss. Apply generous aloe vera gel and reapply every few hours. Paracetamol or ibuprofen can meaningfully reduce inflammation and pain — ibuprofen has some advantage as an anti-inflammatory.
First 48 hours: continue aloe vera. Rest and stay out of further sun entirely. Drink more water than you think you need. Keep the area cool and uncovered where possible.
Recovery phase (days 3–7): transition to moisturising with macadamia or emu oil. A formulated after-sun product with quandong or Kakadu plum extract adds antioxidant support. Do not deliberately pick or peel the skin — let it separate naturally to avoid infection and scarring.
Longer term: the burned area will be more sensitive to UV for several weeks. Be particularly careful with sunscreen and sun avoidance until the skin has fully regenerated.