How does sunburn change over time?

The first signs can take a few hours to appear, and the full effect can take 24 hours or longer. Pain is worst between 6 and 48 hours after exposure. Blisters can develop hours to days later, while flaking or peeling usually starts several days afterwards. Itching is another possible symptom. Sunburn usually gets better within 7 days, but symptom relief does not undo the damage caused by ultraviolet light.123

What does sunburn look like on Black skin?

Black skin can burn even without an obvious red or pink appearance. After sun exposure, check for skin that feels unusually hot or sore rather than relying on colour alone. Peeling or blistering can also occur. Darker skin can take longer to burn than very fair skin, but still needs sun protection.123

What should you do if you notice sunburn?

  1. 1Get out of the sun and keep the affected skin covered from direct sunlight until it has healed.
  2. 2Cool the skin with a cool shower, bath or damp towel. Do not apply ice or ice packs.
  3. 3For skin without blisters, apply an unperfumed moisturiser to ease discomfort.
  4. 4Drink water and, if needed, use pain relief such as paracetamol or ibuprofen following the leaflet instructions.
  5. 5Leave blisters and peeling skin alone. Avoid petroleum jelly and tight clothing over the affected area.
12

When does sunburn need medical help?

Get urgent medical advice for blistered or swollen skin, severe pain, fever, chills, headache, nausea, dizziness or muscle cramps. Yellow crusts can signal infection, and urinating less can signal dehydration. A baby or young child with sunburn also needs urgent advice. Confusion, seizures or loss of consciousness require emergency help because they can be signs of heatstroke.13

How can you prevent another sunburn?

Clothing, a wide brimmed hat and shade belong alongside sunscreen, even if none gets a serum launch campaign.23

Use broad spectrum sunscreen with SPF 30 or higher on exposed skin. Apply generously and reapply every 2 hours, after swimming or sweating, or as the label directs.2

Where this answer comes from

  1. 1Sunburnnhs.uk
  2. 2Sunburn: MedlinePlus Medical Encyclopediamedlineplus.gov
  3. 3Sunburn and sun protection - treatments and prevention including sunscreenhealthdirect.gov.au