Sunburn Recovery Time Calculator

Sunburn is an inflammatory response to ultraviolet (UV) radiation damage to the DNA in skin cells. Despite feeling like a surface injury, sunburn is actually a form of radiation damage that triggers an immune response — which is why it gets worse in the hours after sun exposure and why repeated severe burns increase lifetime skin cancer risk.

Sunburn Severity Grades

Grade 1 — Mild (First Degree)

• Skin is red and warm to the touch
• Slight tenderness
• No blisters
• Recovery time: 3–5 days
• The redness peaks at 12–24 hours after exposure

Grade 2 — Moderate (Second Degree Superficial)

• Intense redness, significant pain
• Skin may swell
• Small blisters may begin forming
• Recovery time: 5–10 days
• Peeling typically begins around day 3–5

Grade 3 — Severe (Second Degree Deep)

• Large blisters, severe swelling
• Skin may feel numb (nerve endings affected)
• Possible chills, fever, nausea (sun poisoning)
• Recovery time: 10–21 days
• Medical attention recommended

Grade 4 — Extreme / Sun Poisoning

• Covers large areas of the body
• High fever, dizziness, dehydration, confusion
• Immediate medical attention required
• Recovery: 2–6 weeks

Recovery Timeline

Regardless of severity, sunburn recovery follows stages:

• Hours 0–6: Redness and heat increase
• Hours 6–24: Peak inflammation — worst pain
• Days 2–3: Heat fades, itching begins
• Days 3–7: Peeling starts (a sign of repair)
• Days 7–21: New skin emerges, sensitivity remains

Key Recovery Tips

Drink extra water — UV exposure causes dehydration. Apply aloe vera or a fragrance-free moisturiser. Take ibuprofen to reduce inflammation. Do NOT pop blisters. Stay out of the sun until fully healed. Avoid tight clothing over burned areas. Wear SPF 30+ sunscreen once healed — new skin is extra sensitive.