CONDITION
Burns
Burns are injuries to the skin and sometimes deeper tissues caused by heat, chemicals, electricity, or radiation. The damage occurs when the tissue is exposed to something that destroys the protective outer layers and, depending on severity, the structures beneath. What an owner observes often depends on the cause and depth: reddened, darkened or weeping skin after contact with a hot surface, singed fur and raw patches from a fire or boiling liquid, or weeping sores after chemical exposure. The appearance at first encounter varies widely. Some burns look mild at the outset and worsen over the following hours or days as the full extent of tissue damage declares itself. Pain levels, the risk of infection, and the time to healing all depend on how much of the skin's thickness has been affected and how large an area is involved. Large burns, burns from a fire where smoke was breathed in, and injuries from chewing an electrical cable can also affect the whole body, with shock or breathing problems developing over hours to days. This page explores the patterns that prompt concern, the processes occurring in burned tissue, the ways burns are assessed and categorised, and the range of approaches used to support healing and manage discomfort.
Why this matters now
Burns can occur at any age and in any breed, though certain circumstances increase exposure risk. Young animals may encounter hot surfaces or liquids through curiosity or lack of learned caution, while older or mobility-impaired animals may be slower to move away from heat sources such as radiators, heating pads, or spilled liquids. Indoor cats and dogs living in homes with open fires, wood-burning stoves, or access to kitchens during cooking face situational risk, as do animals in industrial or farm settings where chemicals or machinery are present.
The visible signs of a burn often evolve over the first 24 to 72 hours after the injury occurs. What appears as mild reddening or singed fur at the time of contact may declare itself as weeping, skin sloughing, or deeper tissue damage as inflammatory processes unfold and blood flow to the injured area changes. Some burns stabilise within hours, while others continue to deepen as cells in the partially damaged zone either recover or die. The time to healing depends on the depth and extent of tissue loss, the body's ability to close the wound, and whether infection takes hold.
Signals & patterns
Early signals
Reddened or darkened skin
The affected area may appear pink, red, or darker than the surrounding skin, often with a clear boundary where contact occurred. In animals with pigmented or thick-coated skin, the change may be subtle and easier to feel as warmth or swelling than to see.
Singed or missing fur
Fur may be visibly charred, matted, or absent over the injury site, sometimes with an odour of burning. The skin beneath may look intact at first, though deeper damage can be present even when the surface appears relatively unharmed.
Pain on touch or movement
The animal may flinch, vocalise, or pull away when the area is touched, or may favour the limb or body part if movement stretches the injured skin. Some animals become quieter or reluctant to settle, particularly if the burn is on a pressure point or joint.
Licking or guarding the area
The animal may repeatedly lick, chew, or attend to the site, or may position itself to prevent contact with the ground, furniture, or other animals. This behaviour often reflects discomfort and can introduce bacteria or further irritate fragile tissue.
Weeping or raw skin
Blisters are less common in dogs and cats than in people, and deeper burns usually have none, so a burn without blisters is not necessarily minor. Where the outer layer of skin lifts or is lost, the surface may look moist, shiny or raw, and fluid may seep from the edges.
Signs of shock after a large burn
When a large area of the body is burned, fluid lost through the damaged skin and into the surrounding tissues can lead to shock within the first 24 to 48 hours. Signs include weakness, pale gums, cold legs and paws, and fast breathing or a fast heart rate, although cats in shock often have a normal or slow heart rate. This is one of the main ways a burn becomes life-threatening.
Breathing changes after a fire or a chewed cable
Coughing, noisy or laboured breathing, or unusual drowsiness after smoke exposure can reflect smoke or carbon monoxide injury. Breathing signs can take more than a day to appear and can worsen over the first 72 hours as the airways swell. After a pet chews an electrical cable, fluid can build up in the lungs, and its onset can be delayed by up to 36 hours. Signs of this include coughing, laboured breathing, white or pink froth from the mouth or nose, and blue or grey gums.
Later signals
Skin sloughing or eschar formation
Over the days following the burn, dead tissue may separate from the underlying layers, forming a dry, leathery crust known as eschar, or the skin may peel away to reveal raw, weeping tissue beneath. The extent of this shedding often reflects the depth of the original injury.
Wound odour or discharge
A foul smell or yellow-green discharge from the site may signal bacterial colonisation or infection, particularly if the protective skin barrier has been lost. The tissue may also appear swollen, darker, or surrounded by spreading redness.
Delayed healing or contracture
Large or deep burns may heal slowly, with the edges pulling inward as scar tissue forms. In some cases, this contraction can limit movement if the burn crosses a joint or involves a significant portion of a limb or the trunk.
Click to read about the biological mechanisms
How this is usually investigated
The investigation of a burn typically begins with a detailed account of what happened: the source of the injury, the duration of contact, and any first-aid measures already taken. Physical examination follows, with attention to the extent and depth of the injury, the presence of pain, and any signs that breathing or circulation may be affected. Further tests are guided by the size and severity of the burn and by concerns about complications such as infection, fluid loss, or damage to underlying structures.
Physical examination
Complete blood count
Chemistry panel
Bacterial culture and sensitivity
Radiography
Options & trade-offs
Management of burns is tailored to the depth and extent of the injury, the presence of complications, and the individual animal's tolerance for handling and confinement. Most approaches combine wound care, pain management, infection control, and support for healing. What works well for one animal may be impractical or poorly tolerated by another, and the approach often evolves as the wound declares its behaviour over the first days and weeks.
Wound lavage and debridement
Burned tissue is gently cleaned to remove debris, dead tissue, and contaminants that can delay healing or promote infection. Debridement, the removal of non-viable tissue, may be performed once the extent of damage is clear, either in stages or as a single procedure. This creates a clean wound bed and allows assessment of the viable tissue beneath.
Trade-offs: Debridement can be painful and often requires sedation or general anaesthesia. Timing is important: removing tissue too early can result in the loss of areas that might have recovered, while waiting too long allows infection to take hold or healing to stall.
Topical wound management
Dressings, ointments, and barrier creams are applied to keep the wound moist, reduce bacterial load, and protect exposed tissue from further trauma. Products containing antimicrobials, hydrogels, or hydrocolloids may be used depending on the stage of healing and the appearance of the wound. Dressings are changed at intervals determined by the amount of exudate and the risk of adherence.
Trade-offs: Some animals tolerate dressing changes poorly, and repeated handling can cause distress or further injury if the wound is fragile. Over-occlusive dressings can trap moisture and promote maceration or infection, while too-dry environments delay re-epithelialisation. Selection and frequency require ongoing adjustment.
Systemic analgesia
Pain from burns can be severe, particularly in the first days and during dressing changes or debridement. Opioids, non-steroidal anti-inflammatory drugs, and adjunctive agents such as gabapentin or amantadine (human medicines with no UK veterinary authorisation, used under the prescribing cascade) may be used in combination to address both nociceptive and neuropathic components of pain. The intensity and duration of analgesia are adjusted as the wound progresses.
Trade-offs: Opioids can cause sedation, reduced appetite, or constipation, and their use must be balanced against the animal's ability to eat and move. Non-steroidal drugs carry risks to kidney function and gastrointestinal integrity, particularly when fluid balance is already compromised by the burn.
Fluid therapy
Animals with burns covering a significant portion of the body surface can lose substantial amounts of fluid through the damaged skin and may develop shock as fluid shifts from the bloodstream into tissues. Intravenous fluids are given to restore circulating volume, maintain blood pressure, and support kidney function. Fluid rates are guided by clinical signs, urine output, and laboratory markers.
Trade-offs: Estimating fluid needs is difficult, as both under- and over-resuscitation carry risks. Too little fluid can lead to organ failure, while too much can worsen tissue oedema and impair oxygen delivery. Close monitoring and frequent reassessment are required, which may necessitate hospitalisation for several days.
Surgical reconstruction
When a burn causes full-thickness loss of skin over a large area, the wound may not be able to heal by contraction and re-epithelialisation alone. Skin grafts, local tissue flaps, or other reconstructive techniques may be used to close the defect and restore barrier function. This is typically considered once the wound bed is clean and granulating.
Trade-offs: Reconstruction requires general anaesthesia, specialised surgical skill, and a period of strict rest to allow graft or flap survival. Failure rates can be significant if infection is present, if blood supply to the transferred tissue is inadequate, or if the animal interferes with the site. Not all wounds are candidates for grafting, and not all owners can manage the aftercare required.
Common misconceptions
"Applying butter, oil, or toothpaste to a burn will help it heal."
These substances do not cool the tissue, can trap heat, and may introduce contaminants or interfere with subsequent medical assessment and treatment. Cooling with clean, cool (not ice-cold) running water for ten to twenty minutes after the injury is the recommended first-aid measure, since heat continues to affect the tissue for some time after contact with the source ends, and stopping earlier can allow the burn to progress deeper than it might otherwise have done. In a cat, a small dog or a large burn, long cooling can chill the whole body, so cooling is aimed at the burnt area while the rest of the animal is kept warm. This is typically followed by covering the area with a clean, non-adherent material.
"If the skin looks intact after a burn, the injury is minor."
Burns can cause significant damage beneath the surface even when the skin appears unbroken. Electrical burns in particular often produce deep tissue injury with minimal external signs. The full extent of a burn often becomes apparent only over the following days as inflammation evolves and non-viable tissue declares itself.
"All burns need antibiotics from the start to prevent infection."
Not all burns become infected, and early use of systemic antibiotics does not reliably prevent colonisation or infection in burn wounds. Systemic (oral or injected) antibiotics are usually kept for burns that show signs of infection, such as pus, spreading redness, fever, or bacteria confirmed on culture. Antimicrobial creams or dressings, such as silver sulfadiazine cream (a human medicine with no UK veterinary authorisation, used in dogs and cats under the prescribing cascade), are often applied by the veterinary team from the start as part of burn care. Overuse can encourage resistant organisms and disrupt normal microbial flora.
Related conditions
Acute Moist Dermatitis (Hot Spots)
Acute moist dermatitis shares with burns the feature of rapid-onset skin damage that creates moist, raw surfaces vulnerable to infection. Both conditions involve breach of the skin's protective barrier and can progress quickly, though the underlying mechanisms differ: self-trauma and inflammation in hot spots, external thermal or chemical injury in burns.
Aspiration Pneumonia
An animal found unconscious or very drowsy after a fire, for example from carbon monoxide, may be unable to protect its airway and can breathe in vomit or saliva, which can cause aspiration pneumonia.
Acute Kidney Injury
Extensive burns can lead to acute kidney injury through several mechanisms, including fluid loss, shock, and the release of breakdown products from damaged tissue that may overwhelm the kidneys' filtering capacity. The severity of kidney involvement tends to relate to the extent and depth of the burn.
Gastric Ulceration
Severe burns and the stress response they provoke can sometimes lead to gastric ulceration, as physiological stress may reduce protective blood flow to the stomach lining and increase acid exposure. This is more often a concern in larger or deeper burns where the body's regulatory mechanisms are strained.
Entropion
Burns to the skin around the eyes can scar and tighten as they heal. Scarring of the eyelid skin more often pulls the lid margin outward or stops the eye closing fully, which leaves the cornea exposed. Scarring of the inner surface of the lid, as after some chemical burns, can instead roll the lid inward like entropion. Either way the cornea can be damaged, through exposure or rubbing, not through the congenital or age-related changes behind typical entropion.
Burns vary widely in severity and outcome, and the course over the first days often determines the longer-term approach. Burns covering a large area, burns from a fire where smoke was breathed in, and injuries from chewing an electrical cable carry risks beyond the wound, including shock and breathing problems, which can be life-threatening and can develop over hours to days. At the skin, some small, superficial burns heal with minimal intervention, while others require weeks of wound care, multiple procedures, or reconstructive surgery. Understanding the signs that suggest progression, such as increasing pain, spreading discolouration or systemic illness, can inform the timing and content of conversations with the veterinary team.
Last reviewed: 9 October 2026 · Dr Alastair Greenway MRCVS