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Sunburn Care: When to See a Doctor

Most sunburns heal at home within a week, but some need medical care promptly, and a few are emergencies. This guide draws a clear line between home care and professional care, so you can act quickly when it matters and rest easy when it does not.

What normal healing looks like

A mild sunburn typically follows a predictable course. Redness and warmth appear within a few hours of exposure and peak between 12 and 24 hours later. The skin feels tender and hot, and may feel tight. Over the next two to three days, the redness fades, and by days three to seven the skin often peels lightly as damaged cells are shed. Mild itching during peeling is normal. Pain should gradually improve each day, and you should feel generally well apart from the sore skin.

Knowing this timeline helps you judge whether something is wrong. A burn that is getting steadily better, even if it looks alarming at its peak, is usually healing normally. A burn that is getting worse after the first day, spreading beyond the originally exposed area, or accompanied by new symptoms such as fever, increasing pain, or blistering that was not there before, deserves a closer look. When in doubt, especially with a child or an older adult, a pharmacist or clinician can assess the burn quickly and save days of worry.

Warning signs that need same-day care

Seek same-day medical advice if any of the following apply. The burn blisters over a large area, or blisters appear on the face, hands, feet, or genitals. The burnt area is very large, roughly larger than the person's hand several times over, or covers a whole limb or the torso. Pain is severe and not relieved by cooling and ordinary pain relief. The person has a fever, chills, or feels generally unwell. The skin shows signs of infection: increasing pain after the first day, spreading redness, warmth, swelling, yellow crusting, pus, or red streaks leading away from the burn.

Other same-day warning signs include swelling of a limb that restricts movement, a burn in a person with diabetes, a weakened immune system, or a skin condition such as eczema, and any burn in a baby or a very young child beyond mild pinkness. Eye symptoms after sun exposure, such as severe eye pain, vision changes, or an inability to keep the eyes open, also need urgent assessment, since the eyes can be sunburnt too, a condition sometimes called photokeratitis. Do not wait for these symptoms to settle on their own.

Emergency signs: call for urgent help

Call emergency services or go to an emergency department immediately if the person shows signs of heatstroke or severe dehydration alongside sunburn: confusion, slurred speech, a very high temperature, hot and dry skin with no sweating, fainting, or a seizure. The same applies to vomiting that prevents fluid intake, extreme dizziness or inability to stand, a rapid heartbeat with breathlessness, or a burn that covers most of the body. These situations are not sunburn alone; they indicate a whole-body emergency in which sunburn is one part of a larger problem.

While waiting for help, move the person to shade or a cool place, remove excess clothing, cool the skin gently with damp cloths, and offer small sips of water if the person is conscious and able to swallow. Do not give alcohol, do not apply ice directly to large burnt areas, and do not try to cool the person aggressively with an ice bath, which can cause shivering and worsen the situation. Keep the person lying down with legs slightly raised if they feel faint, unless breathing is difficult.

Children, older adults and higher-risk people

Children's skin is thinner and more sensitive, and children lose fluid faster relative to body size, so the threshold for seeking care is lower. Any blistering burn in a child, a burn covering a large area, a burn with fever or vomiting, or a burn in a baby under one year should be assessed promptly. Keep children with sunburn out of further sun, encourage fluids, and dress them in loose, soft clothing. Avoid adult pain-relief doses and adult products; ask a pharmacist for the correct product and dose for the child's age and weight.

Older adults also need a lower threshold, because skin heals more slowly, fluid balance is more fragile, and other medicines or conditions can complicate recovery. People taking medicines that increase sun sensitivity, such as certain antibiotics, diuretics, or acne treatments, can burn more severely than expected and should mention their medicines when seeking advice. Anyone with a history of skin cancer, many moles, or a condition that affects the skin should also seek advice sooner rather than later after a significant burn.

What a clinician will do

A clinician will assess the depth and extent of the burn, check for dehydration and infection, and ask about medicines, allergies, and how the burn happened. For a moderate burn, treatment may include a prescription-strength moisturiser or a mild topical steroid for inflammation, advice on pain relief, and a dressing for blistered areas. Blister care is often a surprise: small, intact blisters are usually left alone because the blister roof protects the skin underneath, while large or broken blisters may be dressed sterilely to prevent infection.

For a severe burn, hospital care may involve fluid replacement, wound dressings, pain management, and monitoring for infection. This sounds alarming, but it is the reason early assessment matters: a burn that receives proper care early is far less likely to become infected or to heal with complications. Bring a note of when the burn happened, what you have applied to it, and any medicines you take, since that information helps the clinician judge the burn's course.

Home care while you wait, and what not to do

While waiting for advice, the safe home measures are the familiar ones: cool the skin gently with water or damp cloths, drink fluids steadily, wear loose clothing, and avoid further sun. Do not burst blisters, do not peel skin, and do not apply butter, toothpaste, vinegar, or alcohol-based products. Do not cover a blistered burn with a tight, non-breathable dressing at home unless a clinician has advised it, since trapped moisture and friction can worsen damage.

Do not use leftover prescription creams, steroid creams, or antibiotic ointments unless they were prescribed for this burn. Antibiotic ointment on uninfected sunburn does not prevent infection and can cause contact allergy. Similarly, do not start a new herbal or essential-oil remedy on a burn that is already worsening; adding an irritant to an infected or blistered burn only complicates assessment. When a burn is heading the wrong way, the best home care is simple, gentle, and brief, followed by professional assessment.

After the burn: follow-up and skin checks

Once a significant burn has healed, keep the area protected from further sun for several weeks, since healed skin remains sensitive and is more easily damaged again. Moisturise daily while the skin is dry or flaky, and watch for any area that does not heal, remains painful, or changes in colour or texture. A non-healing area after a burn should be shown to a clinician, particularly in someone with a history of skin problems.

Repeated sunburns, especially blistering burns in childhood and youth, increase the long-term risk of skin cancer, so a severe burn is also a prompt to review sun protection habits for the whole family. That does not mean living in fear of the sun; it means consistent, ordinary protection: shade during the middle of the day, protective clothing and a hat, and sunscreen applied generously and reapplied after swimming and sweating. If you notice a new mole, a mole that changes shape, colour, or size, or a sore that does not heal, arrange a skin check regardless of whether it is related to a recent burn.

Common questions

People often ask whether they need a doctor for a burn that is only red and painful but not blistered. Usually not, provided the area is small, the person feels well, pain improves daily, and there are no risk factors. A pharmacist is a good first port of call for this kind of burn and can advise on pain relief and skin care. Another common question is whether sunburn needs a tetanus check; a superficial sunburn alone does not, but a deep or infected burn with broken skin may prompt a clinician to check vaccination status, so mention it if the burn is severe.

Parents often ask how to tell sunburn from heat rash or an allergic reaction. Sunburn appears on sun-exposed skin, is uniformly red and tender, and follows sun exposure by hours. Heat rash tends to appear in folds and covered areas as small itchy bumps, while an allergic reaction often itches intensely, may involve swelling or hives, and may follow a new product or medicine. If the picture is unclear, or if swelling of the lips, tongue, or face occurs, seek urgent care, since that pattern can indicate a serious allergic reaction.

A quick decision guide

When you are unsure, err on the side of asking. A brief call to a pharmacist, a primary-care clinic, or a health advice line can resolve most uncertainty in minutes, and clinicians would far rather assess a burn that turns out to be mild than see a severe burn days late. Sunburn is common and usually minor, but the exceptions are recognisable, and recognising them early is the most useful sunburn skill of all.

General information only — not medical advice. If you have a medical condition, talk to a clinician before acting on anything here.