Sunburn is your skin’s visible response to too much ultraviolet (UV) radiation. The redness, heat, and pain are signs of a real injury, not just a temporary flush. While the damage to your skin cells begins the moment you get too much sun, the symptoms often peak 24 to 72 hours later. You can ease the pain, reduce the swelling, and help your skin repair itself with a few straightforward steps, starting with cooling the skin and ending with keeping it moisturized as it heals.
What Exactly Happens to Your Skin During a Sunburn?
Sunburn is a radiation burn. When UV rays hit your skin, they damage the DNA inside your skin cells. Your body’s immune system responds by sending extra blood to the area. That increased blood flow is what causes the redness and warmth you feel.
The damaged cells also release chemicals that trigger inflammation. This inflammation causes swelling and pain. In more severe burns, the damaged cells die and your skin peels to shed them. This entire process is your body trying to contain the damage and start repairs.
This is not a surface issue. UV radiation can affect the deeper layers of your skin, which is why a bad sunburn can feel like a mild flu, complete with chills, headache, and fatigue. Treating the burn is about managing this inflammatory response, not just soothing the top layer of skin.
How To Alleviate Sunburn: The First Steps
Your first move should be to get out of the sun immediately. Any further UV exposure will only add to the injury. Once you are indoors, start cooling the skin down.
Take a cool bath or shower. The water should be cool, not ice cold. Ice-cold water can further damage already stressed skin. Let the water run over the burned area for 10 to 15 minutes. This helps lower the skin’s temperature and can significantly reduce pain.
If a bath or shower is not possible, apply a clean towel soaked in cool water to the affected areas. Re-wet the towel as it warms up. Do this for 15 to 20 minutes at a time, several times a day. Cooling the skin is one of the most effective ways to stop the burn from getting worse in the first few hours.
After cooling, pat your skin dry with a soft towel. Do not rub. Rubbing can irritate the burn and cause more damage.
Using Moisturizers and Aloe Vera
While your skin is still damp after cooling, apply a moisturizer. This locks in the water and helps prevent the skin from drying out. Look for a gentle, fragrance-free lotion or cream. Fragrances and alcohol can sting and irritate sunburned skin.
Aloe vera is a well-studied option for sunburn relief. Research has shown that aloe vera has anti-inflammatory properties that can help soothe the skin. Look for a product that contains a high percentage of pure aloe vera gel. You can keep the gel in the refrigerator for an extra cooling effect when you apply it.
Reapply moisturizer or aloe vera several times a day for the first few days. This will keep the skin hydrated and reduce peeling. Peeling is part of the healing process, but keeping the skin moisturized can make it less uncomfortable and less noticeable.
Managing Pain and Swelling
Over-the-counter pain relievers can help with the discomfort. Nonsteroidal anti-inflammatory drugs (NSAIDs) like ibuprofen or naproxen can reduce both pain and inflammation. Acetaminophen can help with pain but does not reduce inflammation.
Follow the dosing instructions on the package. These medications work best when you take them early, within the first few hours of getting burned. They will not prevent the burn, but they can make the peak of the reaction much more manageable.
For swelling, especially in the legs or feet, elevate the affected area. Raising the limb above the level of your heart helps fluid drain away and can reduce the swelling. If a large area of your body is severely burned and swollen, this is a sign you may need medical attention.
What Not To Do When You Have a Sunburn
Certain common remedies can make a sunburn worse. Avoid these completely.
- Do not use ice directly on the burn. Ice can cause frostbite on top of the sunburn, damaging the skin further.
- Do not pop blisters. Blisters are your body’s natural bandage. They protect the raw, healing skin underneath. If you pop them, you risk infection.
- Do not use petroleum jelly or butter. These trap heat in the skin and do not allow it to cool. They can also clog pores and cause infection.
- Do not scrub your skin. Use gentle cleansers and soft towels. Scrubbing will only irritate the damaged layers.
- Do not use products containing alcohol. Alcohol dries out the skin and can cause severe stinging.
When To See a Doctor for a Sunburn
Most sunburns can be treated at home, but some require medical care. A sunburn is a serious injury when it covers a large portion of your body or comes with systemic symptoms.
Seek medical attention if you experience any of the following:
- Blisters covering a large area of your body, such as your entire back or chest.
- Severe pain that does not improve with over-the-counter pain relievers.
- Fever, chills, or severe headache.
- Nausea or dizziness.
- Signs of infection, such as pus, red streaks, or increasing swelling.
- Sunburn that does not improve after a few days.
These symptoms can indicate sun poisoning, which is a severe form of sunburn that requires medical treatment. Do not delay getting help if you have these signs.
How Long Does a Sunburn Take To Heal?
The healing timeline depends on how severe the burn is. A mild sunburn will usually start to fade within three to five days. The redness may turn into a tan, and the skin may peel.
A moderate sunburn, one with blisters, will take longer. Expect the pain to last for about a week or more. The blisters will eventually break or dry out, and the skin will peel for several days after that.
Your skin is actively repairing itself during this time. The peeling is the final stage of that repair. Once the peeling stops, the new skin underneath is very sensitive. Keep it moisturized and protect it with sunscreen to prevent another burn.
Preventing Future Sunburns
The best treatment for sunburn is prevention. The damage from UV radiation is cumulative and increases your risk of skin cancer over time. Protecting your skin is a lifelong habit.
Use a broad-spectrum sunscreen with an SPF of at least 30. Apply it generously to all exposed skin 15 to 30 minutes before going outside. Reapply every two hours, or more often if you are swimming or sweating.
Wear protective clothing, including a wide-brimmed hat and sunglasses. Seek shade during peak sun hours, typically between 10 a.m. and 4 p.m. Remember that UV rays can penetrate clouds, so you can still get burned on overcast days.
No sunscreen blocks 100% of UV rays. Even with protection, your skin can still be damaged. Combining sunscreen with shade and clothing is the most reliable way to avoid sunburn.
Frequently Asked Questions
Should I put ice directly on a sunburn?
No. Ice can cause frostbite and further damage the burned skin.
Is it safe to pop sunburn blisters?
No. Blisters protect raw skin underneath and popping them increases your risk of infection.
Can I use petroleum jelly on a sunburn?
No. Petroleum jelly traps heat in the skin and can clog pores, making the burn worse.
How long until sunburn pain goes away?
Mild sunburn pain usually fades within three to five days, but more severe burns can be painful for a week or longer.

