A second-degree burn damages both the outer layer of skin and the layer beneath it, causing pain, redness, swelling, and blistering. Most small second-degree burns can be treated at home with proper first aid, wound care, and pain management. Larger burns or those on sensitive areas need professional medical attention.
How to Identify a Second-Degree Burn
Second-degree burns, also called partial-thickness burns, look distinctly different from a mild sunburn or minor kitchen burn. The skin turns red or mottled, swells noticeably, and forms blisters that may be intact or ruptured and leaking clear fluid. The area is painful to the touch and often wet-looking. If you see only redness without blisters, you likely have a first-degree burn. If the skin looks white, brown, or leathery and feels numb, that’s a deeper third-degree burn requiring emergency care.
Cool the Burn Immediately
The single most important thing you can do is run cool (not cold) water over the burn for 20 minutes. Research from UC Davis Health shows that cooling a burn with running water for 20 minutes within the first three hours of injury speeds up healing and improves outcomes. This isn’t a quick rinse. Set a timer, hold the burned area under the tap, and let the water do its work.
A few things to avoid during this step: don’t use ice or ice-cold water, which can damage tissue further and restrict blood flow to an area that needs it. Don’t apply butter, toothpaste, or cooking oil. These trap heat in the skin, cause irritation, and increase the risk of infection.
Leave Blisters Intact
Blisters form because your body is creating a natural protective barrier over the damaged skin beneath. The fluid inside cushions the wound and gives the underlying layers a cleaner environment to heal. The American Academy of Dermatology recommends not popping burn blisters. Draining or peeling them opens a direct path for bacteria to enter, raising your infection risk significantly. If a blister breaks on its own, gently clean the area and apply a thin layer of petroleum jelly before covering it with a non-stick bandage.
How to Dress and Protect the Wound
Once the burn is cooled, apply a thin layer of petroleum jelly or an antibiotic ointment and cover it with a non-stick gauze dressing. Regular gauze or cotton can stick to the wound surface and tear new skin when you change the bandage. Non-adherent dressings, foam dressings, or hydrogel sheets all work well for second-degree burns, which tend to produce moderate to heavy amounts of fluid as they heal.
Change the dressing once a day, or whenever it gets wet or dirty. Each time you change it, gently wash the burn with mild soap and water, pat it dry, reapply petroleum jelly or ointment, and cover it with a fresh bandage. Keeping the wound moist is important. Petroleum jelly prevents the area from drying out and forming a scab, and wounds that scab over actually take longer to heal and are more likely to scar.
For burns that are larger or in areas that get a lot of movement (hands, knees, elbows), your doctor may prescribe a medicated cream to apply under the dressing. These prescription creams help prevent bacterial growth on the wound surface.
Managing the Pain
Second-degree burns hurt, sometimes intensely for the first few days. Over-the-counter pain relievers are the first line of defense. Ibuprofen works well because it reduces both pain and inflammation. Acetaminophen is a good alternative if you can’t take ibuprofen. You can take both together for more stubborn pain, since they work through different mechanisms.
Taking pain medication on a regular schedule rather than waiting until the pain becomes severe keeps it more manageable. Expect the worst pain in the first 48 to 72 hours. Pain during bandage changes is common, so timing a dose about 30 minutes before you plan to change the dressing can help.
Signs of Infection to Watch For
Infection is the biggest risk with any second-degree burn. Check the wound each time you change the dressing and look for these warning signs:
- Increasing redness that spreads beyond the edges of the burn, or red streaks extending outward from the wound
- Pus or cloudy drainage rather than clear fluid
- Worsening pain after the first few days, rather than gradually improving
- Foul smell coming from the wound
- Fever developing after the burn
If any of these appear, the burn needs medical evaluation. Infected burns may require oral or topical antibiotics to clear the bacteria before they spread deeper.
When a Burn Needs Professional Care
Not every second-degree burn can be safely managed at home. Seek medical attention if the burn is larger than about 3 inches across, or if it’s located on the face, hands, feet, groin, or over a major joint. Burns that wrap around a finger, arm, or leg also need professional assessment because swelling can cut off circulation.
Burns in children and older adults heal differently and carry higher infection risk, so a lower threshold for seeking care makes sense. The same goes for anyone with diabetes, a weakened immune system, or poor circulation.
How Long Healing Takes
Superficial second-degree burns, where the damage stays in the upper portion of the second skin layer, typically heal in two to three weeks with proper care. Deeper second-degree burns that extend further into the underlying skin layer can take three to six weeks or longer, and sometimes require specialized wound care or even skin grafting if they aren’t progressing.
You’ll know healing is on track when the pain gradually decreases over the first week, the redness starts to fade, and new pink skin begins forming at the edges and base of the wound. If the burn hasn’t shown clear improvement after two weeks, or if it seems to be getting worse rather than better, that’s a sign it may be deeper than initially thought.
Reducing Scarring After the Burn Heals
Once new skin has fully closed over the wound, the work of minimizing scarring begins. Keep the area moisturized with petroleum jelly or a fragrance-free moisturizer. For larger burns, silicone gel sheets placed over the healed skin can help flatten and soften the scar tissue. These are available over the counter at most pharmacies and are typically worn for several hours a day over weeks to months.
Sun protection is critical for healing burn skin. New scar tissue is highly sensitive to UV light, and sun exposure can cause permanent darkening or reddening that makes the scar more visible. Use a broad-spectrum sunscreen with SPF 30 or higher on the area whenever it will be exposed, and reapply frequently. This practice should continue for at least a year after the burn heals, as the skin remains vulnerable to discoloration throughout that period.