Leopard Gecko Diseases: Signs, Causes, and Treatment

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Leopard gecko diseases range from slow husbandry problems to sudden infections. Metabolic bone disease builds up over weeks. Mouth rot and respiratory infection can appear within days.

Eublepharis macularius is a hardy species overall. Most captive bred geckos live 15 to 20 years or longer with good care. This page covers the conditions a reptile vet sees most in this species, their signs, and when to book a visit.

Common Leopard Gecko Diseases and Health Problems

The table below summarizes each condition on this page. Match your gecko’s signs to a row, then read the full section for detail.

Metabolic Bone Disease

Metabolic bone disease starts with too little calcium, vitamin D3, or UVB. The body then pulls calcium from the skeleton to keep blood levels stable. Bones weaken over weeks to months.

This is the most common of all leopard gecko diseases in captivity. It is also almost entirely preventable. Owners who supplement correctly rarely see it.

Early signs include a jaw that feels soft or rubbery. Watch also for reluctance to bear weight and slight swelling along the limbs. As the disease advances, limbs can bow and the jaw may droop.

Severe cases bring tremors, muscle twitching, and spontaneous fractures. The Merck Veterinary Manual also lists a swollen or distorted jaw, limb and spinal fractures, cloacal prolapse, and tetany, and adds inadequate heat to the list of causes, since a cold gecko cannot digest or absorb calcium properly.

A vet confirms the diagnosis with radiographs, which show generalized loss of bone density. Treatment for a collapsed gecko starts with fluids and injectable calcium, then a corrected diet and lighting. Merck rates the prognosis as favorable, especially if the animal is still eating, so early cases usually recover.

Dust feeder insects with a phosphorus free calcium powder. Juveniles and gravid or breeding females need this 3 to 4 times a week. Other adults need it 2 to 3 times a week, and every feeder should be gut loaded first.

Low level UVB is now recommended for this species. Leopard geckos are active mainly at dawn, dusk, and at night. Research still shows they use UVB to make their own vitamin D3.

Mouth Rot (Infectious Stomatitis)

Mouth rot, also called infectious or ulcerative stomatitis, is a bacterial infection of the gums and mouth lining. Bacteria are the main driver behind it. The infection usually follows a stressor such as a cool enclosure, an injury, or a weakened immune system.

Watch for red, swollen gums and thick mucus around the mouth. Appetite often drops along with general alertness. Some geckos breathe with the mouth held open as the infection spreads.

Left untreated, mouth rot can spread to the jawbone or the eyes. It can also lead to pneumonia. Advanced cases can be fatal without treatment.

A reptile vet will clean and irrigate the affected tissue with an antiseptic solution. Most cases beyond a mild one also need a course of systemic antibiotics. Recovery goes faster when the gecko stays at its ideal temperature range.

Keep the warm side of the enclosure between 82 and 90 degrees Fahrenheit. The cool side should sit about 5 degrees lower. A stable, correct gradient supports the immune system during treatment.

Cryptosporidiosis and Other Parasites

Cryptosporidiosis comes from the protozoan parasite Cryptosporidium saurophilum. It spreads through contact with contaminated feces, substrate, or enclosure surfaces. The parasite thickens the intestinal lining and blocks normal nutrient absorption.

Signs include marked weight loss, chronic diarrhea, and long term decline. Some keepers call the visible loss around the tail base “stick tail.” A leopard gecko’s tail normally stores fat, so a thin tail is a red flag.

A vet diagnoses the disease with an acid fast stain on a fresh fecal sample. An endoscopic biopsy is sometimes needed as well. The outlook is guarded to poor, since no treatment reliably clears the infection.

Hyperimmune bovine colostrum and intensive supportive care can stabilize some geckos. Isolate any suspected case right away. The parasite spreads easily between animals that share tools, hands, or substrate.

Coccidia are a separate and more treatable group of parasites. Isospora and Eimeria species affect the gut and gallbladder, while Klossiella affects the kidney. Signs overlap with cryptosporidiosis, including diarrhea, lethargy, and weight loss.

A course of sulfadimethoxine or trimethoprim sulfa over 2 to 4 weeks usually controls the infection. Strict daily cleaning speeds recovery. A follow up fecal test confirms the parasite load has dropped before the gecko is called clear.

Impaction

Impaction is a blockage in the digestive tract. It most often comes from swallowed substrate or from feeder insects that were too large to pass. Loose materials such as sand, corncob bedding, and walnut shell carry the highest risk.

Feeders wider than the gap between the gecko’s eyes are also a common cause. An oversized meal is simply harder to move through the gut. This risk grows if the enclosure runs cool, since digestion slows down.

A gecko with impaction stops passing stool. A firm lump may appear along the lower belly. Lethargy and a drop in appetite often follow.

A mild case sometimes clears with a warm soak and time. A firm lump that does not resolve within a day or two needs a vet exam. Surgery is occasionally required for a severe blockage.

Keep feeders at one half to three quarters the width between the gecko’s eyes. Use paper towel, reptile carpet, or tile rather than loose substrate. Keep the warm side in the 82 to 90 degree range so digestion runs efficiently.

Shedding Problems and Dysecdysis

Leopard geckos shed in patches rather than in one piece the way snakes do, so a normal shed can look messy for a day. Dysecdysis, a difficult or incomplete shed, is one of the most common leopard gecko diseases owners face. Low humidity is the leading cause.

Shedding frequency depends on age, growth rate, and general health. Purdue University’s veterinary hospital puts rapidly growing reptiles at a shed about every 2 weeks. Settled adults shed less often, typically several weeks apart, and no veterinary source fixes a single adult interval.

Skin left behind on a toe can cut off circulation there. If it is not removed, the gecko can lose part or all of that toe. Retained shed around the tail tip and vent causes similar problems.

• Keep a humid hide on the warm side of the enclosure.
• Refresh moist peat or sphagnum moss inside it weekly.
• Offer a shallow, lukewarm soak if shed looks stuck after a cycle.
• Never peel dry, unshed skin. Soften it first and let it come away on its own.

Eye Infections and Eye Problems

Leopard geckos have movable eyelids rather than the fixed clear spectacle most gecko species have. That anatomy brings a different set of eye problems. Debris or retained shed can get trapped under the eyelid and lead to infection.

Signs include a swollen or partly closed eye and visible discharge. A gecko may rub the eye against décor. Squinting that does not clear within a day is also a warning sign.

Low humidity that leaves shed stuck around the eyelid margin is a frequent trigger. Correcting humidity often prevents the problem from returning. An untreated eye infection can spread into deeper tissue and become much harder to treat.

An eye that stays swollen, discharges, or will not open needs a reptile vet. Home treatment is not appropriate for this. Waiting can let a minor infection become a serious one.

Respiratory Infection

A respiratory infection usually follows prolonged cold, damp substrate, or poor airflow. These conditions let opportunistic bacteria settle in the lungs and airway. Weak immune function from other stress makes infection more likely.

Signs include audible wheezing or clicking sounds and mucus at the nostrils or mouth. Lethargy and breathing with the mouth open often follow. This can look similar to mouth rot and sometimes occurs alongside it.

Correcting enclosure temperature is part of treatment. Keep the nighttime low no more than about 10 degrees Fahrenheit under the daytime range. Visible mucus or open mouth breathing still needs veterinary antibiotics rather than a temperature fix alone.

Egg Binding (Dystocia)

Egg binding happens when a gravid female cannot lay her eggs normally. A missing nest box with moist, diggable substrate is a common trigger. Calcium deficiency and obesity going into a clutch raise the risk as well.

A female that strains repeatedly without producing eggs needs urgent attention. A swollen, firm abdomen or a sudden refusal to eat are also warning signs. This is an emergency, not a wait and see condition.

Egg binding can be fatal within days if the eggs are not passed. A vet may use medication or surgery to resolve it. Prompt treatment gives the best outcome for the female.

Tail Loss

Leopard geckos can drop their tail on purpose, a defense called autotomy. A hard grab or a rough handler can trigger it. So can a genuine predator threat.

The tail stores fat reserves for lean times. Repeated tail drops can leave a gecko undernourished even after the wound heals cleanly. A fresh wound needs a clean enclosure to close over without infection.

A regrown tail comes back shorter and a different shape. It regenerates as a rod of cartilage rather than bone, so its color and texture differ from the original. It can still store fat, and LafeberVet notes the original tail can come off with very little pressure, so never restrain a gecko by it.

Handle a leopard gecko by supporting the body rather than the tail. This single habit prevents most avoidable tail loss.

Neurological Signs

Tremors, poor coordination, a head tilt, or circling can show up with several conditions. Advanced metabolic bone disease is one cause. A severe parasitic infection or a viral infection such as adenovirus, which has been documented in this species, are others.

These causes range from a fixable calcium deficiency to a serious viral disease. That range is exactly why guessing at home is risky. Any neurological sign calls for a same day or next day vet visit.

Feeding to Prevent Impaction and Deficiency

Owners often ask how many mealworms to feed a leopard gecko. A fixed count matters less than insect size and portion control. Offer feeders for a few minutes and remove anything left uneaten.

Always size insects at one half to three quarters the width between the gecko’s eyes. This single rule cuts impaction risk more than counting worms does. It applies to crickets and mealworms alike.

Crickets and mealworms form the base of most captive diets. Silkworms, butterworms, and occasional pre killed pinkie mice work as supplements for adults. Gut load every feeder, such as with Repashy Bug Burger, before offering it.

Dust with calcium on the schedule described above. Diet quality drives both metabolic bone disease and general resistance to the other conditions on this page. See the full leopard gecko diet guide for a schedule by age.

When to See a Reptile Veterinarian

Book a same day or next day exam for any of the following. A swollen or discolored jaw is one. So is mucus around the mouth or nose, an eye that will not open, or a firm belly lump with no stool in over a week.

Prolonged straining in a gravid female is also urgent. The same goes for any tremor, head tilt, or loss of coordination. These signs point to conditions, from mouth rot to egg binding, that get harder to treat the longer they run.

Good husbandry prevents most leopard gecko diseases before they start. Review enclosure setup on the leopard gecko housing guide and temperature targets on the heating and lighting guide. The general lizard health guide covers signs of illness that apply across species.

The lizard shedding guide has more detail on humidity and shed cycles. The leopard gecko anatomy guide explains the eyelid and tail traits behind several conditions on this page. The leopard gecko care guide ties daily husbandry together.

Frequently Asked Questions

How often should a leopard gecko shed?

Shedding slows down as a gecko matures. A veterinary hospital source puts rapidly growing reptiles at about one shed every 2 weeks, while settled adults go several weeks between sheds. Temperature, humidity, and health all shift the interval.

What does mouth rot look like in the early stages?

The earliest sign is usually red or slightly swollen gum tissue along the tooth line. A thin film of mucus sometimes appears too. A gecko may eat less before any visible swelling shows.

Can metabolic bone disease be reversed?

Mild to moderate cases often improve once calcium, vitamin D3, and UVB are corrected under veterinary guidance. Bone density can partially recover over months. Severe cases with fractures or a badly deformed jaw usually leave some permanent change.

Is cryptosporidiosis contagious to other geckos?

Yes. Cryptosporidium saurophilum spreads through contact with contaminated feces, substrate, or shared tools. A suspected case should be isolated at once with separate equipment for cleaning and feeding.

How many mealworms should I feed my leopard gecko?

Feed for a few minutes and remove anything left over rather than counting out a fixed number. Insect size relative to the gecko’s head matters more than the count for avoiding impaction.

What causes a leopard gecko’s tail to drop?

Tail drop is a voluntary defense called autotomy. A hard grab, a predator bite, or rough handling can trigger it. The tail regrows as a cartilage rod with a different shape and color, and it can store fat again over time.