How Long Does Sunburn Last?

Quick Answer

Mild sunburn (red, warm skin without blisters) lasts 3–5 days. Moderate sunburn with blistering takes 1–2 weeks. Severe sunburn with extensive blistering and swelling can take 3+ weeks to heal. Pain is usually worst at 6–48 hours after sun exposure.

Sunburn Timeline

Mild Sunburn

• Hours 1–6: Skin turns pink/red, feels warm
• Hours 6–24: Redness deepens, skin becomes tender
• Day 1–2: Peak pain and redness
• Day 3–5: Pain fades, peeling begins
• Day 5–7: Peeling completes, skin returns to normal

Moderate Sunburn

• Hours 6–24: Deep redness, significant pain
• Day 1–3: Swelling, possible blistering
• Day 3–7: Blisters may pop, peeling begins
• Day 7–14: Gradual healing, new skin visible

Severe Sunburn

• Hours 6–24: Intense redness, severe pain, swelling
• Day 1–3: Extensive blistering, possible fever, chills, nausea (sun poisoning)
• Day 3–10: Blisters drain, significant peeling
• Day 10–21+: Slow healing, risk of infection

Sunburn Severity Scale

Degree	Appearance	Pain Level	Duration
First-degree (mild)	Red, dry, warm	Mild–moderate	3–5 days
First-degree (moderate)	Dark red, tender, tight	Moderate	5–7 days
Second-degree (blistering)	Red with blisters, swollen	Severe	1–3 weeks
Severe/Sun poisoning	Extensive blisters, fever, nausea	Severe	2–3+ weeks

How to Treat Sunburn

Immediate (First 24 Hours)

• Cool the skin — cool (not cold) compresses, cool shower or bath
• Moisturize — apply aloe vera gel or moisturizer with aloe while skin is damp
• Hydrate — sunburn draws fluid to the skin surface; drink extra water
• Take anti-inflammatories — ibuprofen reduces pain, swelling, and redness
• Stay out of the sun — further exposure worsens damage

Days 2–5

• Continue moisturizing — aloe vera, soy-based moisturizers, or hydrocortisone cream (1%) for severe itching
• Don't pop blisters — they protect healing skin underneath. If they break, clean gently and apply antibiotic ointment
• Wear loose, soft clothing over burned areas
• Don't peel skin — let it shed naturally

Recovery

• Keep new skin protected — it's extra sensitive to UV for weeks after healing
• Wear SPF 30+ on healed areas when going outside

When to See a Doctor

• Sunburn covers a large area of the body
• Blisters cover more than 20% of the burned area
• Fever above 101°F, chills, or nausea (sun poisoning)
• Signs of infection — increasing pain, swelling, pus, red streaks
• Severe pain not controlled by OTC medications
• Dehydration symptoms — dizziness, rapid pulse, dry mouth

Long-Term Skin Damage

Even after sunburn heals, the DNA damage persists:

• 5+ blistering sunburns before age 20 increases melanoma risk by 80%
• Each sunburn increases lifetime skin cancer risk
• Premature aging, wrinkles, and dark spots are cumulative
• Wear sunscreen (SPF 30+), seek shade, and wear protective clothing

Prevention

• Apply SPF 30+ broad-spectrum sunscreen 15 minutes before going outside
• Reapply every 2 hours and immediately after swimming or sweating
• Seek shade between 10 AM and 4 PM when UV is strongest
• Wear protective clothing, wide-brimmed hat, and UV-blocking sunglasses
• Check the UV index — extra caution needed at 6+