A third-degree burn looks white, deep red, or black, with a thick, leathery texture that sets it apart from other burns. The burned skin may also appear waxy or charred. Unlike the angry red, blistered look of a second-degree burn, a third-degree burn often looks surprisingly dry and stiff, and the person may not feel pain directly at the burn site because the nerve endings have been destroyed.
How a Third-Degree Burn Looks and Feels
The hallmark of a third-degree burn is its color and texture. The skin can range from a waxy white to a deep, dark red to completely black and charred, depending on the heat source and how long the skin was exposed. The surface feels thick and leathery rather than soft or wet. There are no blisters, which is actually a key visual clue: blisters form when the deeper layer of skin is still alive and producing fluid, but in a third-degree burn, those layers are destroyed entirely.
The burned area often looks sunken or tight compared to surrounding skin. It won’t blanch (turn white and then return to color) when you press on it, because the tiny blood vessels beneath the surface have been destroyed. The edges of the burn may blend into areas of second-degree injury, which will look red, wet, and blistered by comparison.
One of the most counterintuitive things about third-degree burns is the lack of pain at the center of the wound. Because the burn destroys nerve endings along with every layer of skin, the burned area itself may feel numb. The surrounding skin, where the injury transitions to a less severe burn, is typically extremely painful. Over time, as healing progresses, some people develop abnormal nerve sensations in and around the burn site, including tingling, shooting pain, or electric shock-like feelings. Post-burn skin also tends to require more pressure to detect touch, meaning sensation in the area may never fully return to normal.
What Makes It Different From a Second-Degree Burn
The visual differences between second- and third-degree burns are distinct once you know what to look for. A second-degree burn affects the outer skin and the layer just beneath it. It looks red, wet, and swollen, and it produces blisters filled with clear fluid. It hurts intensely because the nerve endings are damaged but still functional.
A third-degree burn goes through all layers of skin and sometimes into the fat and muscle tissue underneath. Instead of red and wet, it looks white, black, or deep red and dry. Instead of blisters, the surface is firm and leathery. Instead of sharp pain, there’s numbness at the center. If you’re looking at a burn and it appears stiff, dry, and discolored without blistering, that’s the pattern of a full-thickness injury.
Common Causes
Third-degree burns most often result from prolonged contact with a heat source rather than brief exposure. The most common causes include direct flames from a fire, scalding liquids, prolonged contact with a hot object, electrical sources, and chemical exposure. Brief contact with something hot typically causes a first- or second-degree burn. It takes sustained heat, very high temperatures, or a chemical or electrical source to destroy the full thickness of the skin.
How the Body Is Affected
A third-degree burn destroys the epidermis (outer skin), the dermis (deeper skin containing blood vessels, nerves, and sweat glands), and sometimes the underlying fat and muscle. This matters because the dermis contains the structures your body uses to regrow skin. When those are gone, the burn cannot heal on its own the way a superficial burn does. Small third-degree burns may eventually close from the edges inward, but larger ones require skin grafting, where healthy skin is transplanted from another part of the body to cover the wound.
Doctors estimate the severity of a burn partly by how much body surface area it covers. The system used for adults assigns 9% to the head, 9% to each arm, 18% to each leg, 18% to the front of the torso, 18% to the back, and 1% to the groin. For young children, the head accounts for a larger proportion (about 20%) and the limbs proportionally less. These percentages help medical teams decide how aggressively to treat fluid loss and whether transfer to a specialized burn center is needed. The American Burn Association recommends immediate consultation for all full-thickness burns, regardless of size.
Healing and Recovery
Small third-degree burns take at least three weeks to heal. Larger burns can take a couple of years to fully close and mature, and the scarring is typically permanent. Because the skin’s regenerative structures are destroyed, most third-degree burns that cover a significant area need skin grafting. The grafted skin won’t look or feel exactly like the original, but it restores a functional barrier against infection and fluid loss.
During healing, watching for signs of infection is critical. A healthy healing burn changes gradually, but warning signs include new drainage from the wound, expanding redness around the edges, or a significant shift in color. Bacterial infection can turn a wound purple or gray. In some cases, small patches of dead tissue produce a soft white discharge that looks like cottage cheese. Systemic infection from a burn (sepsis) shows up as high fever above 39°C (102°F), confusion, decreased urination, or difficulty tolerating food.
Immediate Care Before the Hospital
If you’re with someone who has what looks like a third-degree burn, cool the area with cool or lukewarm running water for 20 minutes. Do not use ice, ice water, butter, or any greasy substance on the burn. Cover the area loosely with a clean, non-fluffy material like cling wrap or a clean cloth. Third-degree burns always need professional medical treatment, and the person should get to an emergency department as quickly as possible, particularly if the burn covers a large area, wraps around a limb, or involves the face, hands, feet, or groin.