Sunburn is not simply an uncomfortable reminder of a long day outdoors. It is a radiation injury to the skin caused by ultraviolet (UV) exposure, and repeated burns increase the risk of skin cancer. Knowing how to treat sunburn safely can reduce immediate pain, protect damaged skin and help you recognise when home care is no longer enough.

In Australia, UV levels can be damaging even when the day feels mild or cloudy. If your skin is red, hot, tender or swollen after being outside, act early. The aim is to cool the skin, manage discomfort, prevent dehydration and avoid causing further damage while it heals.

How to treat sunburn safely at home

The first step is to get out of the sun straight away. Seek shade or go indoors, cover the affected area with loose clothing, and do not assume that a little more exposure will be harmless because the burn has already happened. Your skin is injured and needs protection.

Cool the skin with a cool shower, bath or damp compress for 10 to 20 minutes. The water should feel comfortably cool, not icy. Repeat this as needed over the first day or two. A cool bath can be particularly useful when a larger area, such as the back, shoulders or legs, is affected.

Avoid ice packs or direct ice on sunburnt skin. Extreme cold can further injure already damaged tissue. Skip very hot showers as well, as heat can worsen discomfort and dry the skin.

After cooling, gently pat the area dry rather than rubbing it. Apply a plain, fragrance-free moisturiser or aloe vera gel while the skin is still slightly damp. This can ease tightness and help the skin retain moisture. Choose products without alcohol, perfume or harsh active ingredients, which may sting or irritate broken skin.

Drink extra water over the next 24 to 48 hours. Sunburn draws fluid towards the skin’s surface and can contribute to dehydration, especially after a hot day, physical work or sport. Water is usually suitable, while an oral rehydration drink may help if you have been sweating heavily or feel mildly unwell.

For pain, paracetamol or an anti-inflammatory medicine such as ibuprofen may help when used as directed on the packet. Ibuprofen is not suitable for everyone, including some people with stomach ulcers, kidney disease, certain heart conditions, or those taking particular medicines. If you are unsure, ask a pharmacist or doctor before taking it. Do not give medicines to children without checking the correct product and dose for their age and weight.

What not to put on sunburn

Well-meaning home remedies can make a burn worse. Do not apply butter, cooking oils, petroleum-based products, toothpaste or heavily scented creams. These can trap heat, irritate the skin or increase the chance of infection.

Be cautious with topical anaesthetic creams or sprays containing ingredients such as benzocaine or lidocaine. They can cause irritation or allergic reactions, particularly over large areas of damaged skin. Strong exfoliants, retinoids and acne treatments should also stay off sunburnt areas until the skin has recovered.

A moisturiser is helpful, but it is not a substitute for avoiding UV exposure. Keep the affected skin completely out of direct sun until it has healed. If you must be outdoors, use loose, tightly woven clothing that covers the burn, seek shade and plan activities outside the middle of the day when UV is often strongest.

Blisters need gentle care

Blistering means the sunburn is more severe. Do not pop or peel blisters. The skin over a blister protects the tissue beneath and lowers the risk of infection.

If a blister opens on its own, gently wash the area with clean water and mild soap, pat it dry, and cover it with a sterile non-stick dressing. Change the dressing if it becomes wet, dirty or loose. Avoid adhesive dressings directly over fragile or peeling skin where possible.

Do not pull away peeling skin. Peeling is part of the healing process and may continue for several days. Use moisturiser to reduce dryness and itching, wear loose clothing, and let the skin shed naturally.

When sunburn needs medical attention

A mild burn can often be managed at home, but severe sunburn can require urgent clinical assessment. Seek same-day medical advice from a GP, urgent care service or health advice line if you have extensive blistering, severe pain, marked swelling, or a burn covering a large area of your body.

You should also seek prompt medical care if sunburn is accompanied by fever, chills, nausea, vomiting, headache, dizziness, fainting, confusion or significant weakness. These symptoms may indicate heat illness, dehydration or a more serious reaction. If someone is confused, collapses, has a seizure, is difficult to wake, or appears severely unwell, call 000.

Sunburn on the face, eyes, hands, feet, genitals or over large joints deserves a lower threshold for medical review because these areas are sensitive and can affect normal function. Eye pain, light sensitivity, blurred vision or a gritty feeling after strong sun exposure should be assessed promptly.

Infants and young children need particular care. A sunburnt baby should be assessed by a doctor, especially if they are under 12 months old. Children can become dehydrated quickly and may not be able to explain how unwell they feel. Older adults, people with chronic illness, people taking medicines that increase sun sensitivity, and those with a weakened immune system should also seek advice earlier rather than later.

Watch for signs of infection as the burn heals: increasing redness or warmth, worsening pain, pus, red streaks, fever, or swelling that does not settle. These are not expected features of normal healing and should be reviewed by a clinician.

Sunburn and skin cancer risk

Sunburn does not mean you will develop skin cancer, but it is a clear sign that your skin has received too much UV radiation. The risk is cumulative. Childhood burns, repeated holiday burns, outdoor work and everyday incidental exposure can all add up over time.

Once the redness settles, use the experience as a reason to strengthen your daily sun-protection routine. In Australia, sun protection is recommended whenever the UV Index is 3 or above. That means seeking shade, wearing sun-protective clothing, a broad-brimmed hat and close-fitting sunglasses, and applying broad-spectrum, water-resistant SPF50+ sunscreen generously. Sunscreen should be reapplied every two hours, and after swimming, sweating or towel drying.

Sunscreen matters, but it should not be your only defence. It can be missed, rubbed off or applied too thinly. Clothing and shade provide more reliable physical protection, particularly for outdoor workers, gardeners, beachgoers, parents at weekend sport and anyone spending long periods on the water.

Do not ignore changes that remain after healing

Most sunburn redness fades within several days, although more severe burns can take longer. If a spot, sore, scaly patch or pigmented mark remains after the burn has healed, or if it changes, bleeds, crusts or will not heal, arrange a skin check. This is especially important if you have had frequent sun exposure, a personal or family history of skin cancer, many moles, fair skin, or a weakened immune system.

Skin cancer can occur in all skin tones. In darker skin, changes may be easier to miss and can appear on less sun-exposed areas, including the palms, soles, nails and inside the mouth. Any new or changing lesion deserves attention.

A sunburn can feel temporary, but the UV damage behind it is not something to dismiss. Treat the injury carefully, stay out of further sun while you heal, and make a skin check part of acting early when something on your skin does not look or feel right. Knowledge can save your life.