Crested Gecko Diseases: Signs, Causes, and When to See a Vet

Crested gecko diseases fall into a short, repeating list. Metabolic bone disease, floppy tail syndrome, dehydration, stuck shed, internal parasites, mouth rot, and tail loss cover most cases. A healthy crested gecko is alert at dusk and grips glass or branches with all four feet.

It holds a rounded body and a full tail base. It sheds in one clean piece every few weeks. An unhealthy crested gecko shows the opposite pattern.

Signs include a sunken tail base and a soft or bent jaw. Lethargy at feeding time and skin stuck past a normal shed cycle also count. This guide covers each disease, its cause, and its warning signs.

It also flags when the right move is a reptile veterinarian, not more forum reading. It builds on the general care guide and the crested gecko overview rather than repeating them.

What a Healthy Crested Gecko Looks and Weighs Like

A healthy crested gecko carries visible weight along the tail base and hips. It should not look obese, but a flat or concave tail base signals lost condition. That usually points to poor appetite, parasites, or a sparse diet.

Body shape is a more reliable quick check than a scale for most keepers. A crested gecko’s healthy weight depends on its frame, sex, and whether it kept its tail. Weigh a juvenile every one to two weeks and an adult about once a month.

Log each number and watch the trend. A single low reading matters less than a downward trend over several weigh ins. A gravid female or a gecko that just shed can show a temporary dip.

Animal Diversity Web gives 30 to 35 grams as the typical adult mass, at 102 to 119 millimeters snout to vent. Well fed captive lines run heavier, and keepers commonly report 35 to 60 grams for a full grown adult. Some large females run higher, so track each gecko against its own baseline.

Arbor View Animal Hospital lists this species as prone to four problems in particular: nutritional secondary hyperparathyroidism, shedding trouble, parasites, and substrate impaction. It recommends a veterinary exam every 6 to 12 months. Another exotics clinic asks for an annual wellness exam with a fecal check.

Metabolic Bone Disease in Crested Geckos

Metabolic bone disease is also called nutritional secondary hyperparathyroidism. The body pulls calcium out of the skeleton to keep blood calcium stable. Lafeber’s veterinary reference describes MBD as a common reptile condition rooted in an imbalance of calcium, phosphorus, and vitamin D3.

In a crested gecko this usually follows a diet that skips calcium supplementation. Inconsistent use of a complete powdered diet has the same effect. Either gap starves the skeleton of calcium over weeks or months.

The Merck Veterinary Manual lists the signs in lizards as poor appetite, weakness, an inability to walk normally, a swollen or distorted jaw or leg bones, fractures of the spine or legs, cloacal prolapse, and muscle spasms. In a crested gecko the first visible change is often a jaw that looks soft, swollen, or asymmetrical. A spine or tail may develop a new kink, and the gecko may stop climbing.

Merck notes that rapidly growing insect eating species are hit hardest, which is why juveniles need the closest watch. Besides diet, it names inadequate UVB and incorrect temperatures as contributing causes.

Early MBD can look like simple lethargy. A keeper who tracks weight and behavior closely catches it sooner. Prevention rests on consistent calcium delivery.

Dust feeder insects with calcium powder on a regular schedule. Or feed a complete gecko diet formula as covered in the diet guide. Pair that with correct UVB from the heating and lighting guide.

A gecko with visible bone deformity needs an exotic veterinarian promptly. The same is true for a jaw that will not close or a gecko that cannot right itself. MBD that has already reshaped bone will not reverse fully, but calcium and vitamin D3 correction under veterinary guidance can stop it from progressing.

Floppy Tail Syndrome in Crested Geckos

Floppy tail syndrome is reported specifically in crested geckos and their close relatives. The tail develops a permanent kink or bend, most often near the base. It no longer holds a straight resting position.

This differs from a tail dropped through autotomy. In floppy tail syndrome the tail stays attached. The deformity is in how it sits and moves, not a loss of the tail itself.

No veterinary manual or peer reviewed paper has yet described the condition, so what follows is the consistent explanation from exotics practitioners and keepers. Geckos that hang head down on flat glass, with the tail flopping over the back, tend to develop it. Repeated pressure on a still developing tail base is the most commonly proposed cause.

It shows up far more often in juveniles than in adults, which points to housing and posture as the leading factor. Prevention is largely a housing fix. Give young crested geckos plenty of vertical space with cork bark, branches, and foliage, as described in the housing guide, so they rest gripping upright instead of pressed flat against glass.

There is no established treatment that straightens a tail once floppy tail syndrome sets in. The deformity is typically cosmetic and does not on its own threaten health. A vet visit still helps rule out MBD or a fracture as the real cause.

Crested Gecko Shedding and Stuck Shed

A shedding crested gecko sheds in a single sitting roughly every few weeks as a juvenile. That cycle slows with age. A gecko about to shed often looks dull or slightly pale for a day or two first.

The skin then splits and peels away, usually within a night. A healthy gecko frequently eats its own shed once it comes off. Stuck shed, known clinically as dysecdysis, happens when old skin fails to come away.

Merck names the spectacle over the eye, tail bands, and toe skin as the parts most often retained. Retained bands can constrict circulation, and over several days that can cost the gecko a digit or its tail tip. Low humidity is the first cause Merck lists, followed by skin parasites, nutritional deficiency, infection, and a lack of rough surfaces to rub against; the humidity guide covers the fix for the first one.

To fix stuck shed, raise humidity first. Merck’s method is a soak in warm water of 77 to 85 F, or a humidity chamber made from wet towels in a covered container, then gently working the loosened skin free with gauze. A damp cotton swab does the same job on a small gecko.

Never pull dry, unsoftened shed. That can tear healthy skin underneath. A retained spectacle is treated by a vet with eye ointment for several days until it lifts, and shed already tightened around a toe or the tail also needs a vet.

Dehydration in Crested Geckos

Crested geckos come from humid New Caledonian forest. They drink mainly from water droplets on leaves after misting. A dehydrated gecko usually reflects an enclosure that runs too dry, not a missing water dish.

Merck gives loose skin and sunken eyes as the two signs of dehydration in reptiles. Reduced appetite and darker coloring that lingers also point to it. Mild dehydration usually resolves within a day or two of fixing misting frequency, and Merck’s first treatment is simply a shallow warm bath.

Confirm the gecko has access to standing droplets after each misting. A gecko with sunken eyes that will not drink offered droplets needs a veterinary check. The same applies if lethargy joins the skin changes, since dehydration compounds other problems on this list.

Worms in Crested Gecko Poop and Internal Parasites

Crested gecko worms in poop are usually nematodes or protozoan parasites. A low level of some gut organisms is normal in a captive reptile. What matters clinically is parasite load and species, not the mere presence of an organism.

A fecal exam through a reptile veterinarian is the only reliable way to know if treatment is needed, since a visual look at droppings cannot tell you that. Cryptosporidiosis is the parasite crested gecko keepers are warned about most. It is caused by the protozoan Cryptosporidium, is difficult to treat, and spreads easily through contaminated feces, substrate, and shared tools.

Merck lists regurgitation, marked weight loss, and long term weakness as the signs, with the intestine affected in lizards. Some keepers call it stick tail disease, since the tail loses its taper as condition drops. Merck states that several treatments have been suggested but most do not work consistently, and that intensive supportive care often stabilizes and prolongs the life of an infected reptile.

Any new gecko should be quarantined before joining a collection. Any gecko showing these signs should be isolated with separate tools while a fecal test confirms the cause. For general worm concerns short of suspected cryptosporidiosis, a fecal float from a reptile veterinarian identifies the parasite and whether treatment is warranted.

Mouth Rot in Crested Geckos

Mouth rot, known clinically as infectious stomatitis, is a bacterial or fungal infection of the gum and mouth tissue. It takes hold when the immune system is already stressed. Poor husbandry, an untreated mouth injury, or a concurrent illness such as MBD are common triggers.

Early signs are subtle. Merck describes tiny purplish red spots inside the mouth at first, then dead tissue along the tooth rows as it worsens. Discharge at the mouth corner, swelling, and reduced interest in feeding follow, and severe cases extend into the jaw bones covered in the anatomy guide.

Mouth rot does not resolve on its own and does not respond to home remedies. Merck’s treatment is surgical removal of dead tissue, antiseptic cleaning, antibiotics, and supportive care, and it notes that vitamin A and C supplementation may help. The vet should also review what husbandry stressor let it start, since Merck says the bacteria involved normally live in a healthy mouth.

A gecko with any visible mouth swelling or discharge should see a vet within a few days. Do not wait a week to see if it clears up.

Tail Loss and Autotomy

Crested geckos can drop their tail defensively when grabbed, startled, or stressed. This process, called autotomy, is a normal survival behavior, not an injury in the usual sense. The dropped tail segment keeps twitching for a short period afterward.

That twitching is a reflex in the severed tissue, not a sign of ongoing distress. Unlike nearly all other gecko species, a crested gecko does not regrow a lost tail, a fact confirmed by a 2024 genome study and repeated on every veterinary care sheet. Once it is gone, it is gone permanently.

The stump generally heals on its own within one to two weeks if kept clean and the substrate stays free of anything that could infect the wound site. A stump that stays open, oozes past the first few days, or that the gecko keeps irritating needs a vet.

To avoid unnecessary tail loss, let the gecko walk across your hands. Do not grip its tail or body, and follow the handling notes in the behavior guide. Keep any tank mates that could stress or grab a cage mate’s tail out of the enclosure.

Give a new or skittish gecko time to settle before regular handling. A female that is gravid or has just finished breeding is also more prone to stress related autotomy. Extra caution during that period helps prevent an avoidable tail drop.

When to See a Reptile Veterinarian

Several signs on this list justify a same week veterinary visit. A jaw that will not close or looks asymmetrical is one. A tail or spine kink that appeared suddenly, and sunken eyes with refusal to drink, are two more.

A steady weight decline across multiple weigh ins also qualifies. So does any mouth swelling or discharge, and shed tightened around a toe or the tail. A crested gecko that stops eating for more than a week, outside a normal seasonal slowdown, needs attention.

The same goes for a gecko that goes completely inactive during its normal dusk window. Finding a vet before an emergency happens is worth the effort. Not every general veterinarian treats reptiles.

Look specifically for a reptile or exotic animal veterinarian ahead of time. Keep that contact on hand. A small reptile first aid kit helps with minor shed and hydration issues.

Frequently Asked Questions

What is the most common cause of crested gecko diseases?

Husbandry gaps cause most items on this list. Insufficient calcium and UVB drive metabolic bone disease. Low humidity drives stuck shed and dehydration, and stress or unclean substrate drives mouth rot and parasite spread.

Can a crested gecko recover from floppy tail syndrome?

The tail deformity itself is generally permanent once it sets in, since it reflects how the tail developed rather than an active injury. Most geckos with floppy tail syndrome live a normal lifespan with a cosmetic tail bend. A vet should still rule out metabolic bone disease as the actual cause first.

How do I know if my crested gecko has worms versus a normal parasite load?

Only a fecal test through a reptile veterinarian tells a harmless parasite load from one that needs treatment. Both can look identical in the droppings to the naked eye. Weight loss, chronic soft stool, or regurgitation alongside visible worms points toward a load that needs veterinary attention.

Is cryptosporidiosis in crested geckos curable?

Cryptosporidium has no reliably curative treatment in reptiles. That is why quarantine for new geckos, and separate tools for a suspected case, matters more than treatment after the fact. Some geckos manage the infection long term with supportive care, but it stays highly contagious to other geckos in the collection.

How often should a healthy crested gecko be weighed?

Weigh a juvenile every one to two weeks and an adult about once a month. Track the trend, not any single number, since healthy weight varies by size, sex, and tail status. A steady decline across two or more weigh ins is the signal to investigate.

Will a crested gecko’s tail grow back after it drops?

No. A 2024 genome study lists the crested gecko among only 14 gecko species that cannot regenerate a tail, so loss from autotomy or injury is permanent. The stump typically heals within one to two weeks if it stays clean.