A lizard that has fallen, been crushed or stepped on: blunt trauma in the first fifteen minutes

Quick answer

A lizard after a fall, contained on a flat surface with the kit already open. Most of the first fifteen minutes is containment, warmth and observation rather than treatment.

Lizards are dropped, stepped on, shut in doors and knocked off climbing branches far more often than they are involved in the dramatic accidents people plan for. The danger in all of them is the same: a reptile with serious internal injury frequently walks away and behaves normally.

The reason is metabolic. An ectotherm runs every biological process at the speed its body temperature allows, so bleeding, shock, infection and organ failure declare themselves over days rather than minutes. A lizard that seems fine two hours after a fall has told you almost nothing.

• Contain first. A tub with a lid, kitchen paper on the base, nothing to climb, nothing loose that can stick to a wound.
• Control bleeding with direct pressure. Never a tourniquet, never a styptic on a large wound.
• Keep it warm, at the top of its normal range and no hotter. Clotting, immune function and healing are all temperature dependent.
• Never pick a lizard up by the tail, and never wrap the body tightly. Lizards have no diaphragm and breathe by moving the rib cage.
• Book a reptile vet even if the animal looks unhurt. The injuries that kill after a fall usually announce themselves between one and three days later.

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"It ran off afterwards, so it must be fine" is the sentence that precedes most preventable deaths after a fall.

A reptile's coelom is a single body cavity with no diaphragm separating chest from abdomen. Bleeding from a torn liver or a bruised kidney fills that cavity and presses directly on the lungs, and the process takes hours to days. The animal stays upright, stays alert and often eats, right up until it collapses.

Bladder rupture and gut perforation follow the same delayed pattern. Any lizard that has fallen onto a hard surface, been crushed in a door or been stepped on needs veterinary assessment within a day, whatever it looks like.
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Decide in 60 seconds

Why a reptile hides an injury that would floor a mammal

Everything an ectotherm does biologically happens at a rate set by its body temperature. That includes the ones that matter here.

Clotting is enzymatic, and enzymes slow as temperature falls. A lizard sitting at the cool end of its range bleeds for longer from the same wound than the same lizard at its optimum. This is why "keep it warm" appears before "apply a dressing" in every reptile first-aid sequence.

Immune function is temperature dependent in the same way, which is why an injured reptile kept too cool develops an infection that a properly warmed one clears.

Then there is the anatomy. The reptilian coelom is one continuous cavity. There is no diaphragm dividing a chest from an abdomen, so a bleed originating anywhere inside it has direct access to the space the lungs need to expand into. Owners describe a lizard that seemed fine and then, a day later, started breathing with its mouth open.

Lizards also ventilate by moving the rib cage rather than by pulling down a diaphragm. Holding a lizard firmly around the body, or wrapping it in a towel to keep it still, restricts exactly the movement it uses to breathe.

Finally, behaviour. Reptiles do not vocalise pain, do not limp theatrically and rarely stop moving. Reduced appetite, a change in basking position, a reluctance to climb and a slight asymmetry in how the animal sits are what you get instead.

The accidents that actually happen

Falls from a hand, a shoulder or the top of an open enclosure.

The commonest of all. A lizard startles, jumps, and lands on a hard floor. Height matters less than the surface: a short fall onto tile does more damage than a longer one onto carpet.

Fractures after a trivial fall.

If a lizard breaks a limb falling a short distance, look past the fracture. Metabolic bone disease weakens the skeleton to the point that normal activity breaks it, and it is usually already present in the spine and jaw as well. That animal needs whole-body imaging and a husbandry review, not a splint.

Doors.

Sliding glass enclosure doors, room doors and cabinet doors crush tails, toes and pelvises. Enclosure doors closed on a lizard that was climbing the frame are a recurring pattern.

Being stepped on or sat on during free-roaming time.

The injuries are pelvic, spinal and abdominal, and the animal is often not found immediately.

Falls inside the enclosure.

A lizard that falls off a branch onto rock or a hard hide is usually a lizard that has become weak, and weakness in a climbing species is a medical sign in itself.

Escaped animals.

A lizard recovered from behind furniture may have trauma, a burn from a radiator or heater, and dehydration together.

The first fifteen minutes, in order

The whole useful kit: a carrier, clean towels, sterile gauze, sterile saline, and clean instruments. Nothing here is a treatment. It is containment, pressure and transport.

1. Contain before you assess.

Put the animal into a plastic tub with a ventilated lid, lined with plain kitchen paper. No loose substrate, because sand and bark stick to wounds and end up inside them. No branches, no rocks, nothing that allows a second fall.

2. Pick it up correctly.

Approach from the side rather than from above, which reads as a predator. Support the whole body and the pelvis with two hands. Never lift or restrain by the tail: many lizards will shed it, and in some species it never regrows.

3. Stop the bleeding.

Firm direct pressure with sterile gauze, held continuously for several minutes. Do not lift the pad to check. A small bleed from a nail or a tail tip can take a styptic powder or cornflour, but never pack styptic into a large or deep wound.

Never apply a tourniquet. Reptile limbs tolerate them very poorly and the tissue beyond is easily lost.

4. Get the temperature right.

Aim for the upper part of the species' normal range and no higher. Warmth supports clotting and immunity. Overheating an animal that is already compromised does harm.

In transport, use an insulated box with a heat pack that is wrapped so it never touches the animal directly. In a hot climate the rule inverts: an air-conditioned car and shade matter more than added heat.

5. Flush only with sterile saline.

Nothing else. No hydrogen peroxide, which destroys the tissue trying to heal. No alcohol. No tea tree or other essential oils, which are toxic to reptiles. No mammal ointments or creams.

6. Do not splint, bind or glue anything.

Home splints cause pressure sores, hide the injury and complicate the radiograph. Reptile fractures are managed by a vet, often with a light tape splint or with surgery, and the choice depends on images you do not have.

7. Withhold food. Do not force water. Do not bathe it.

An injured lizard should not be soaked. Water contaminates wounds and an obtunded animal can drown in a shallow bath.

8. Record.

Time, what happened, the height, the surface, what the animal did afterwards, and photographs of anything visible. Note the weight if you have scales.

9. Phone ahead.

Call the reptile vet before setting off, so they know what is arriving and can prepare.

What to check while you wait

A brief mouth check tells you three things at once: the colour of the mucous membranes, whether the jaw lines up, and whether there is blood. Do it once, gently, and only if the animal permits it.

Mucous membrane colour. The inside of the mouth should be pink. Pale, white or grey suggests blood loss and is one of the few home findings that changes urgency immediately.

Jaw alignment. Look at whether the mouth closes evenly. A jaw that sits crooked or will not close indicates a fracture, and in a young or badly kept lizard it points at metabolic bone disease.

Breathing. Watch the rib movement. Open-mouth breathing in an animal at a normal temperature is abnormal. Clicking, bubbling or effortful breathing after trauma suggests something in the coelom is pressing on the lungs.

Limb symmetry and use. Compare left with right. Note any limb held away from the body, rotated, or not weight bearing.

Toe pinch. Pinch a toe on each foot and watch for withdrawal. A lizard that withdraws the front feet but not the back ones has a lesion between them, which changes both the handling and the urgency.

Spine and tail base. Look along the spine for a step or a kink, and check whether the tail base has tone or hangs limp.

Vent. Check for protruding tissue or blood.

Underside. Look at the belly scales for dark bruising, swelling or asymmetry. Bruising in reptiles often looks dark green or grey rather than purple.

Righting reflex. If the animal is safely handleable, note whether it can right itself. Do not repeat this test.

The injuries that arrive later

Hours zero to two. Visible bleeding, obvious fractures, and shock. Shock in a reptile is quiet: a still animal, dull colour, weak grip, no interest in surroundings.

Twelve to seventy-two hours. This is the dangerous window. Bleeding into the coelom shows as increasing pallor of the mouth, lethargy, and breathing that becomes effortful. A ruptured bladder produces a slow deterioration as waste products accumulate. Gut perforation seeds infection that takes days to declare.

Days three to fourteen. Wound infection. Reptile inflammatory cells produce solid caseous material rather than liquid pus, so an infected wound forms a firm abscess with a capsule. It does not drain and it does not resolve with a cream. Removing it later is a surgical procedure, which is the strongest argument for having a small wound seen early.

Weeks to months. Fracture healing in reptiles is slow and depends on temperature, ultraviolet provision and calcium status being correct throughout. A fracture in a lizard with poor husbandry does not heal until the husbandry is fixed. Nerve injuries either recover over weeks or do not.

What the vet will do, and what to bring

Expect radiographs, usually of the whole body rather than the injured part alone. Whole-body images routinely reveal what the owner did not know about: reduced bone density, older healed fractures, retained eggs, or gut contents that change the plan.

Expect an assessment of blood loss, which may include a packed cell volume and total solids. Reptile blood values shift with temperature, season, sex and species, so a single number is interpreted alongside the clinical picture rather than against a fixed table.

Expect fluids, given by a route suited to reptiles rather than into a vein, and analgesia. Antibiotics follow if there is a wound or a suspected perforation.

Bring the animal warm and contained, and bring information: species and age, exactly what happened including height and surface, the time it happened, when it last ate and last passed a dropping, the enclosure temperatures at both ends, the age of the ultraviolet lamp, what supplementation it gets, and any previous fractures or health problems.

The husbandry questions are not a formality. In a lizard that fractured from a small fall, they are the diagnosis.

Preventing the next one

What never to do

Never lift or hold a lizard by the tail. In species that drop it, you will remove it. In species that do not, you can injure the spine.

Never wrap a lizard's body tightly to keep it still. Ribs are how it breathes.

Never use hydrogen peroxide, surgical spirit, undiluted disinfectant, or essential oils on a reptile wound.

Never apply a tourniquet.

Never splint or glue a limb, a jaw or a tail at home.

Never give a human painkiller.

Never cool a lizard in the belief that it slows bleeding. Cold stops clotting and shuts down immunity.

Never soak or bathe a lizard with an open wound or one that is not fully alert.

Never return an injured lizard to a normal enclosure. It goes into a flat, bare, warm hospital setup with no climbing furniture and no loose substrate until a vet says otherwise.

Never conclude that a lizard which walked away is uninjured.

When to get help

Recovery looks like this: normal posture, normal interest in food, using all four limbs evenly. Appetite returning is one of the more reliable signs that things are moving the right way.

Travel immediately for bleeding that does not stop under pressure, blood from the mouth, nose or vent, a limb or jaw that hangs abnormally, dragging hind limbs, laboured or open-mouth breathing, an animal that cannot right itself, or an animal that is limp and unresponsive.

Book within twenty-four hours for any fall onto a hard surface, any crush injury, any wound however small, and any lizard that has been stepped on, even if it appears entirely normal.

Watch for three days afterwards and go back sooner if the mouth looks paler, if breathing changes, if the animal stops eating, if it stops passing droppings, or if it becomes reluctant to move.

Access to reptile veterinary care varies enormously by region, and a general small-animal practice may not have reptile imaging or experience. That is worth resolving on a quiet afternoon rather than at nine at night. Find the nearest practice that sees reptiles, confirm they do, and write the number somewhere another member of the household can find it.