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 or blistered 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. 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 blistering, 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.

Blistering or weeping

Fluid-filled blisters may form within hours of the injury, particularly after scalds or contact burns. If the outer layer of skin lifts or ruptures, the surface may appear moist, shiny, or raw, and fluid may seep from the edges.

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.

Systemic signs in extensive burns

When a large proportion of the body surface is affected, the animal may show signs beyond the wound itself: reduced appetite, lethargy, increased thirst, or changes in breathing or heart rate. These patterns reflect the metabolic and fluid shifts that can accompany widespread tissue injury.

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

Purpose: The clinician assesses the percentage of body surface area affected, the depth of tissue injury, the colour and texture of the burned area, and the presence of blistering, charring, or exposed underlying tissue. Pain response, capillary refill in surrounding skin, and signs of shock or respiratory distress are also noted.
Considerations: The full extent of a burn often cannot be determined at the first examination, as tissue damage may progress over the following 24 to 72 hours. Serial examinations are often needed to track whether the injury is stabilising or deepening.

Complete blood count

Purpose: This test evaluates red blood cell levels, which may fall if bleeding has occurred, and white blood cell counts, which can rise in response to inflammation or infection. It can also reveal haemoconcentration when significant fluid has been lost through the burn wound.
Considerations: Findings may be normal in the first hours after injury and change as the inflammatory response develops. A single sample provides a snapshot; trends over time are often more informative than isolated values.

Chemistry panel

Purpose: Electrolyte disturbances, kidney function changes, and shifts in protein levels can all occur following significant burns, particularly when fluid loss is substantial or when tissue breakdown releases cellular contents into the bloodstream. This panel helps guide fluid therapy and identify organ involvement.
Considerations: Abnormalities tend to develop over hours to days rather than appearing at the moment of injury. Serial testing may be needed in animals with large or deep burns to monitor for complications such as acute kidney injury or electrolyte imbalance.

Bacterial culture and sensitivity

Purpose: When a burn wound shows signs of infection—such as purulent discharge, worsening odour, or failure to heal—a sample of tissue or exudate can be cultured to identify the organisms present and determine which antimicrobials are effective against them.
Considerations: Burn wounds are often colonised by bacteria within days of injury, and the presence of organisms does not always indicate clinically significant infection. Culture results are interpreted alongside the appearance of the wound and the animal's systemic response.

Radiography

Purpose: Radiographs may be taken when there is concern that deeper structures—bone, joint, or lung—have been affected, or when foreign material such as metal fragments may be embedded in the wound. Chest radiographs can identify smoke inhalation injury or aspiration pneumonia.
Considerations: Superficial burns do not require imaging. Radiography is useful when the mechanism of injury suggests deeper involvement or when clinical signs point to complications beyond the visible wound.

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—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 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

Misconception:

"Applying butter, oil, or toothpaste to a burn will help it heal."

Reality:

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 at least ten to twenty minutes after the injury is the most useful immediate 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. This is typically followed by covering the area with a clean, non-adherent material.

Misconception:

"If the skin looks intact after a burn, the injury is minor."

Reality:

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.

Misconception:

"All burns need antibiotics from the start to prevent infection."

Reality:

Not all burns become infected, and early use of systemic antibiotics does not reliably prevent colonisation or infection in burn wounds. Antimicrobials are typically reserved for situations where clinical signs of infection are present, such as purulent discharge, advancing redness, systemic fever, or culture-confirmed bacterial invasion. 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

Animals with burns affecting the face, mouth, or airways—particularly from smoke inhalation or fire—may inhale foreign material or fluids that can lead to aspiration pneumonia. Both conditions can also occur together when a dog or cat is found unconscious or unable to protect its airway during a burn incident.

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 affecting the skin around the eyes or eyelids can alter the normal position of the lid margin, sometimes causing a temporary or permanent inward rolling similar to entropion. Both conditions result in damage to the corneal surface, though burns do so through direct tissue injury and scarring rather than congenital or age-related changes.

Burns vary widely in severity and outcome, and the course over the first days often determines the longer-term approach. Some wounds stabilise and heal with minimal intervention, while others require weeks of wound care, multiple procedures, or reconstructive surgery. Understanding the signs that suggest progression—increasing pain, spreading discolouration, systemic illness—can inform the timing and content of conversations with the veterinary team.

Last reviewed: 13 September 2026 · Dr Alastair Greenway MRCVS