Sunburn: Symptoms, Treatment, Recovery, and Prevention
Medically reviewed by Dr. Baraa Alnahhal, MD · Last reviewed: October 2026
Quick Answer
Sunburn is skin inflammation caused by too much ultraviolet (UV) light from the sun or tanning beds. Redness starts 3 to 5 hours after exposure and peaks at 12 to 24 hours. Most mild sunburns heal in 3 to 7 days with cool baths, moisturizer, water, and ibuprofen or aspirin. Blistering, fever, confusion, or vomiting need medical care.
Starts: 3–5 hours after sun exposure
Worst: 12–24 hours after exposure
Redness fades: in 3–7 days; blisters heal in 7–10 days
Best home care: cool showers, aloe or soy moisturizer, extra water, ibuprofen or aspirin
Get help fast: fever with vomiting, confusion, fainting, signs of dehydration, or large blisters
What Is Sunburn?
Sunburn is your skin's inflammatory reaction to UV radiation damage. It is not just a "tan gone wrong." It is a sign that UV light has damaged the DNA inside your skin cells.
Two types of UV light cause the damage:
UVB rays are absorbed directly by the DNA in skin cells and cause most of the redness and burning.
UVA rays reach deeper and damage cells through oxidative stress.
Your body responds by sending more blood to the area and releasing inflammatory chemicals. That is why burned skin turns red, feels hot, and hurts to touch.
What Are the Symptoms of Sunburn?
Symptoms usually appear within a few hours of sun exposure. Common signs include:
Red or pink skin (it may look darker or purple on brown and Black skin)
Skin that feels hot and tender to the touch
Pain, itching, and swelling
Small fluid-filled blisters (in more severe burns)
Peeling skin a few days later
A severe sunburn can also cause whole-body symptoms, such as headache, fever, chills, nausea, and tiredness. Your eyes may feel painful or gritty if they were also exposed.
How Long Does Sunburn Last?
Sunburn follows a predictable timeline:
Hours 3–5: Redness appears.
Hours 12–24: Pain and redness reach their peak.
Days 3–7: Redness fades in most mild burns.
Days 7–10: Blisters heal and skin may keep peeling.
If your sunburn is getting worse after the first two days instead of better, see a doctor.
Who Is Most at Risk of Sunburn?
Anyone can get sunburned, including people with darker skin. Your risk is higher if you:
Have fair skin, red hair, or skin that burns easily
Have had sunburns before
Live in a sunny or high-altitude place
Work outdoors
Spend time near water, snow, or sand, which reflect UV light
Drink alcohol while outdoors
Take medicines that make your skin more sensitive to light (ask your pharmacist if yours do)
How Do You Treat Sunburn at Home?
Most sunburns can be treated at home. Start as soon as you notice the burn.
Cool the skin. Take frequent cool baths or showers, or use cool, damp compresses. Pat your skin dry gently instead of rubbing.
Moisturize while skin is still damp. Use a lotion or gel that contains aloe vera or soy. Calamine lotion or a cool colloidal oatmeal bath can also soothe itching.
Take a pain reliever. Ibuprofen or aspirin can reduce pain and swelling. Follow the package directions. Do not give aspirin to children or teenagers.
Drink extra water. A sunburn draws fluid to the skin's surface and away from the rest of your body.
Leave blisters alone. Do not pop them. Keep them clean and cover them with a thin layer of petroleum jelly while they heal.
Stay out of the sun until your skin heals, and cover burned areas with loose clothing.
What Should You Avoid?
Numbing creams (local anesthetic creams) are not recommended for sunburn.
Steroid creams and pills have not been shown to help sunburn heal.
Picking or peeling skin raises the risk of infection. Let it come off on its own.
When Should You See a Doctor for Sunburn?
Contact a doctor if you:
Develop large blisters
Have blisters on your face, hands, or genitals
Have severe swelling
See signs of infection, such as pus or red streaks
Have worsening pain, headache, confusion, nausea, fever, or chills
Get worse despite home care
Have eye pain or changes in your vision
Go to the Emergency Room If You Have:
A fever above 103°F (39.4°C) with vomiting
Confusion
Signs of dehydration, such as very little urine, dry mouth, or dizziness
Cold skin, dizziness, or fainting
These can be signs of a severe burn, heat illness, or dehydration. Very large areas of blistering can require IV fluids in hospital, just like other burns.
Is Sunburn Dangerous in the Long Run?
Yes. Each sunburn adds to long-term skin damage. Repeated UV exposure can lead to:
Premature skin aging: wrinkles, dark spots, and rough skin
Precancerous spots: rough, scaly patches called actinic keratoses, and on the lips, actinic cheilitis
Skin cancer, including melanoma: melanoma is more strongly linked to short, intense sun exposure and sunburns than other skin cancers
Eye damage: including cornea injury and cataracts
This is why preventing sunburn matters more than treating it.
How Can You Prevent Sunburn?
Use several layers of protection together:
Choose the right sunscreen. Pick one that is SPF 30 or higher, broad-spectrum (protects against UVA and UVB), and water resistant.
Use enough. Adults need about 1 ounce (a shot glass full) for the whole body and about 1 teaspoon for the face.
Apply it early. Put sunscreen on about 15 minutes before going outside so your skin can absorb it.
Reapply often. Reapply every 2 hours, and right after swimming or sweating.
Don't miss spots. Cover your neck, ears, tops of your feet, and scalp. Use an SPF 30+ lip balm.
Avoid peak hours. UV light is strongest between 10 AM and 4 PM. Seek shade during this time.
Wear protective clothing. A wide-brimmed hat, sunglasses, and long sleeves block UV light without needing reapplication.
Skip tanning beds. Artificial UV light causes the same damage as the sun.
How Do You Protect Babies and Children From the Sun?
Babies younger than 6 months should be kept out of direct sunlight. Use shade and light clothing that covers arms and legs. If shade isn't available, a small amount of sunscreen on exposed areas such as the face and hands is acceptable.
Older children should use SPF 30+ broad-spectrum sunscreen and reapply every 2 hours.
Do not give aspirin to children or teenagers for sunburn pain. Ask a pharmacist or doctor which pain reliever and dose are right for your child's age and weight.
Questions to Bring to Your Doctor
Print or save these questions for your appointment:
Is my sunburn mild, moderate, or severe?
Should I be worried about these blisters or this swelling?
Do any of my medicines make my skin more sensitive to the sun?
How often should I get a skin check for skin cancer?
Which sunscreen type is best for my skin?
More Sunburn and Sun Safety Guides on Rinnit
For Clinicians and Creators
Creating sun safety content for your clinic, school, or social media? The Animated Medical Prevention Icons for Health Awareness pack helps you turn prevention tips like these into short, clear videos.
Frequently Asked Questions
How long does a sunburn take to heal?
Mild sunburn redness usually fades in 3 to 7 days. Blisters take about 7 to 10 days to heal, and peeling can continue during that time.
Does aloe vera help sunburn?
Yes. Moisturizers that contain aloe vera or soy can soothe sunburned skin. Apply them while your skin is still slightly damp after a cool shower.
Should I pop sunburn blisters?
No. Blisters protect the healing skin underneath. Keep them clean, cover them with petroleum jelly, and let them heal on their own.
Can you get sunburned on a cloudy day?
Yes. UV light passes through clouds, so you still need sun protection on cloudy days.
Can people with dark skin get sunburned?
Yes. Darker skin has more natural protection, but it can still burn and still develop skin cancer. Everyone should use sun protection.
References
This article is for general informational purposes only and is not a substitute for professional medical advice, diagnosis, or treatment. If you have a severe sunburn, blisters over a large area, fever, confusion, or signs of dehydration, seek medical care promptly.
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