A second-degree burn damages both the outer layer of skin (epidermis) and the layer underneath it (dermis). This makes it more serious than a first-degree burn like a sunburn, but less severe than a third-degree burn that destroys the full thickness of skin. The hallmark signs are blisters, skin that looks shiny and moist, and coloring that ranges from deep red to dark brown. These burns are painful, sometimes intensely so, because the nerve endings in the dermis are exposed and irritated.
Two Types of Second-Degree Burns
Not all second-degree burns are the same. Doctors divide them into two subtypes based on how deep the damage goes into the dermis, and the difference matters because it affects how they heal and whether scarring is likely.
Superficial partial-thickness burns affect the upper portion of the dermis. They typically form blisters within 24 hours, look red and wet, and blanch (turn white briefly) when you press on them. They hurt significantly because the nerve endings are intact and fully exposed. These burns generally heal within two to three weeks without surgery, and scarring is usually minimal.
Deep partial-thickness burns extend further into the dermis and damage hair follicles and sweat glands. They still blister, but the blisters peel away easily. The skin underneath may look waxy, patchy white, or mottled rather than uniformly red. When pressed, they blanch slowly or not at all. Pain is different too: deep partial-thickness burns are mainly painful to pressure rather than constant, because some nerve endings have been destroyed. These burns take longer to heal, often three to six weeks or more, and carry a higher risk of scarring. Some require skin grafting.
What a Second-Degree Burn Looks and Feels Like
The most recognizable feature is blistering. Within hours of the injury, fluid collects between the damaged layers of skin, forming raised pockets that can range from small bubbles to large, fluid-filled sacs. The surrounding skin appears deep red to dark brown, depending on the severity and your natural skin tone. The surface often looks shiny and moist because the protective outer barrier has been lost, allowing fluid to weep from the wound.
Pain is usually the most immediate concern. Because the dermis contains a dense network of nerve endings, superficial second-degree burns can be among the most painful of all burn types. Ironically, a deeper burn may feel less painful on the surface, which can be misleading. If a burn doesn’t hurt as much as you’d expect given its appearance, that can actually indicate deeper damage rather than a milder injury.
First Aid in the First Minutes
What you do immediately after a second-degree burn makes a real difference in how it heals. Run cool (not cold) water over the burned area for about 10 minutes. Cold water or ice can actually make the injury worse by constricting blood vessels and causing further tissue damage. After cooling, loosely cover the burn with a clean, non-stick bandage or cloth.
A few things to avoid: don’t pop blisters, as intact blisters act as a natural protective barrier against infection. Don’t apply butter, toothpaste, or other home remedies, which can trap heat and introduce bacteria. And don’t wrap the burn tightly, because swelling is common in the first 24 to 48 hours.
How These Burns Are Treated
For smaller second-degree burns, treatment focuses on keeping the wound clean, moist, and protected from infection. Doctors typically apply a topical antimicrobial agent and cover the burn with a specialized dressing. Foam and alginate dressings are commonly used because second-degree burns tend to produce moderate to high amounts of fluid drainage, and these materials absorb it effectively.
Plain gauze on its own is generally avoided because it sticks to the wound bed and causes pain and further damage when removed. Instead, non-stick mesh or film dressings are used as a base layer. For clean, uninfected burns, biosynthetic dressings or skin substitutes can be applied once and left in place. These adhere to the wound and separate on their own as the skin heals underneath, which means fewer painful dressing changes.
Deep partial-thickness burns that don’t show signs of healing within a few weeks may need a skin graft, where healthy skin is transplanted from another area of the body to cover the wound. This is more common with burns that have damaged hair follicles and glands, since those structures are needed for skin to regenerate from the wound bed.
When Burns Need a Burn Center
Most small second-degree burns can be managed at an urgent care clinic or your doctor’s office. But larger burns need specialized care. The general guidelines for burn center referral are based on the percentage of total body surface area affected. For children under 10 and adults over 50, second-degree burns covering more than 10% of the body warrant a burn center. For other age groups, the threshold is 20%. For reference, the palm of your hand (including the fingers) represents roughly 1% of your body surface area.
Location also matters regardless of size. Burns on the face, hands, feet, genitals, or over major joints carry higher risks of complications and functional problems during healing. Burns that wrap all the way around an arm or leg are also treated as more serious because swelling can cut off circulation.
Signs of Infection
Infection is the main complication to watch for as a second-degree burn heals. Because the skin’s protective barrier is broken, bacteria can enter the wound more easily than with intact skin. Warning signs include increasing pain after the first day or two (rather than gradually improving), spreading redness beyond the edges of the burn, green or yellow discharge, a foul smell, fever, or red streaks radiating outward from the wound. Any of these signs mean the burn needs medical attention promptly, as an infected burn can worsen quickly and may convert a partial-thickness injury into a full-thickness one.
What to Expect During Healing
Superficial second-degree burns typically heal within two to three weeks. New skin grows from the base of the wound and from the edges inward. During this time, the area will be tender and pink. Once healed, the skin may be a slightly different color than the surrounding area for several months, but significant scarring is uncommon.
Deep partial-thickness burns follow a slower, less predictable path. Healing can take three to six weeks or longer, and the new skin that forms is often thinner and more fragile. Scarring is more likely, and some people develop raised (hypertrophic) scars that can feel tight or itchy. Pressure garments and silicone sheets are sometimes used during the months after healing to help flatten and soften scar tissue. Sun protection on the healed area is important for at least a year, since new skin burns much more easily and sun exposure can darken scars permanently.