Common Leopard Gecko Health Issues and What to Watch For

Leopard geckos are generally hardy, but a few conditions come up often enough that every owner should know the warning signs. One of them, covered below, has no cure, which makes early recognition genuinely important.

Metabolic Bone Disease (MBD)

Common in leopard geckos partly because they're so often kept without UVB, without proper calcium supplementation, or without adequate heat, all three of which contribute, though it's largely preventable once heat and calcium are handled correctly. Watch for pathological fractures, twisted or bent limbs, a soft or deformed jaw (sometimes called "rubber jaw"), tremors, difficulty eating, lethargy, and weight loss.

If you suspect MBD, handle your gecko extremely gently and remove any climbing decor, a fall that wouldn't normally matter can fracture weakened bones. See a vet promptly. Leopard geckos appear to rely heavily on UVB and correct basking temperature to process calcium properly, not diet supplementation alone, which is part of why low-level UVB is worth providing even though it's technically optional for this species.

Cryptosporidiosis, Also Called "Stick Tail Disease"

This is the one condition every leopard gecko owner should be able to recognize, because it's severe, highly contagious, and currently has no cure. In leopard geckos this parasite commonly causes clinical disease and wasting, though not every carrier shows symptoms right away. A PCR screen of one Thai breeding facility found it in 51% of the geckos tested.

Watch for: a tail that thins out to a "stick," looking emaciated with no fat reserves, general weight loss and emaciation, loss of appetite, passing undigested food, foul-smelling feces, and a bloated or extended belly.

This is diagnosed through a fecal PCR test from a reptile-experienced vet, though false negatives happen, so a single clear test doesn't fully rule it out. The main treatment drug, paromomycin, manages the condition rather than curing it, and mortality for symptomatic stick tail disease runs around 50%. If a gecko doesn't respond well to treatment within a month, the outlook is generally poor.

This is exactly why quarantining any new gecko for 3 to 6 months before introducing it to others matters, since asymptomatic carriers can spread it without showing any signs themselves. Bring a fresh fecal sample to the first vet visit, and ask for the cryptosporidiosis PCR test by name.

Impaction

Usually caused by ingesting loose substrate, most often sand, or prey that's too large to pass safely. Contributing factors include low basking temperature, dehydration, and parasites. Look for a bloated abdomen, loss of appetite, weight loss, and a lack of normal bowel movements.

Warm baths and gentle belly massage help mild cases. A true blockage may require surgery, which is part of why non-particulate substrate (paper towel, tile) is the safer choice, especially for anyone newer to the hobby.

Shedding Problems (Dysecdysis)

Caused by low humidity or a vitamin A deficiency. A humid hide is the fix for the first. Retained shed builds up around the eyes, toes, and tail tip. At the eyes it is the serious version, because shed left there can cover them and stop the gecko from seeing. Never ignore a constricting band of shed there, since left unaddressed it can cut off circulation badly enough to cause tissue death and lost digits. Never peel off dry, stuck shed. Soak the gecko in shallow lukewarm water first to loosen it. A dedicated humid hide prevents most of this before it starts, and checking the toes, eyes, and tail tip after every shed catches problems early.

Obesity

A healthy adult stores its reserve in the tail, and that tail is nearly as wide as the rest of the body. An overweight gecko carries fat past that point: a tail wider than the body, a thick layer over the back and sides so the spine and ribs can no longer be felt, fat under the neck that hangs like jowls, and a pear-shaped torso instead of a streamlined one. The fix is in the food bowl. Space adult meals out to the adult feeding schedule, and cut the fatty treats, waxworms and superworms, first.

Respiratory Infection

A bacterial infection, and in a leopard gecko it almost always starts with an enclosure that is too cool, too damp, or both. Watch for open-mouth breathing, bubbly saliva, clogged nostrils, lethargy, appetite loss, and weight loss. It does not clear on its own: a reptile vet prescribes antibiotics, usually with a probiotic, and a sick gecko may need extra fluids and assisted feeding while it recovers. At home, the fix is the one that prevents it: bring the warm side back up to temperature, and look for the source of excess moisture, such as a humid hide that has soaked the substrate around it.

Egg Binding (Dystocia)

A female leopard gecko can produce eggs with no male in the enclosure. Most reptiles brought to a vet for egg binding are single females that have never met a male, so any adult female needs a place to lay.

Signs a female is gravid: a bulging belly, weight gain, restlessness, more digging, and a smaller appetite.

Clutches. A clutch is two eggs. A mature female can lay four to five clutches in a season, about a month apart, so a female that has just laid is often gravid again a few weeks later.

The lay box. Give her a covered container large enough to turn around in but small enough to feel enclosed, filled with damp sphagnum moss she can dig into. The moss should be damp but not waterlogged, holding about 70 to 80% humidity inside the box. Place it in a quiet corner where she feels secure. A female with nowhere suitable to lay may hold her eggs, which is how a normal clutch turns into dystocia.

Prevention. The other causes are husbandry: temperatures too hot or too cold, wrong humidity, missing UVB, a diet low in calcium or protein, and dehydration. Keep up the calcium dusting for any adult female whether or not she is kept with a male, because a low-calcium diet is one of the causes on that list.

Signs of trouble: straining, restlessness, weakness, a distended belly, depression, and appetite loss in a female that has not laid. Laying itself should be over in less than 48 hours. A female still digging and straining past that point, or one that turns weak or listless at any stage, has stopped being a normal clutch. This can be fatal without intervention, so it's a same-day vet visit. A vet may start with fluids, calcium, and hormone injections, and surgery follows if those fail.

Vent or Cloacal Prolapse

Tissue visibly protruding from the vent. This is an emergency, get to a vet immediately.

When to See a Vet

• A thinning "stick" tail combined with weight loss
• Jaw softness or visible deformity
• Tremors
• Any breathing difficulty
• Drooling or pus around the mouth
• Appetite loss that comes with a visibly thinning tail
• Prolapse
• Retained shed that's swollen, darkened, or won't clear from the eyes or toes

An annual wellness exam is worth doing even for a gecko that seems perfectly healthy. Several of the conditions above, cryptosporidiosis especially, can be present without obvious symptoms until they're advanced.

Sources & Further Reading

Printable Guide

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