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Health

Learn the signs that mean a vet the same day, and what you'd do if you couldn't keep it any more.

In this chapter

Health: what to watch for

Most problems are shared, and most start with the setup

Nearly every common reptile illness traces back to temperature, humidity, hygiene or diet. When something looks wrong, check the temperatures with your gun first, then see a vet. These problems can affect any species.

What you seeLikely causeWhat to do
Respiratory infection
Wheezing or clicking, open-mouth breathing, bubbles or mucus at the nostrils
Too cold, too damp, stale air or dirty substrate, usually two at onceVet. Fix the conditions; switch to paper substrate while treating
Mites
Tiny black or red specks around the eyes, chin and vent; drowned mites in the water bowl; constant soaking
A new animal, second-hand equipment, or contaminated substrateIsolate. Treat the animal and the enclosure together with a reptile-safe product, and repeat on the product's interval
Mouth rot
Swollen gums, cheesy yellow discharge, refusing food, rubbing the face
Poor conditions, or a mouth injury, often from live preyVet. Not treatable at home
Stuck shed
Patchy old skin; retained eye caps on snakes; rings on toes and tail tips of lizards
Humidity too low through the shedRaise humidity, add a humid hide, a shallow lukewarm soak. Never peel. Vet if it persists into the next shed
Scale rot
Brown, raised or blistered belly scales
Persistently wet or fouled substrateVet. Dry the enclosure, paper substrate, clean daily
Burns
Discoloured or blistered skin on the back or side
An unguarded or unthermostatted heat sourceVet. Fix the cause before the animal goes back
Internal parasites
Weight loss while still eating; runny or foul-smelling droppings
Often arrives with a new animal or live foodFaecal parasite screen at the vet
Dehydration
Wrinkled or tented skin, sunken eyes, thick sticky saliva
Water the animal does not recognise or cannot reach, or an enclosure too hot and dryFix water provision for the species. Vet if severe

Problems particular to one group

GroupWatch for
SnakesRegurgitation, when prey is too large, the snake is handled too soon after eating, or it is too cold to digest. Retained eye caps. Head tilt or corkscrewing, a neurological sign linked to certain morphs.
Insect-eating lizards
leopard gecko, bearded dragon, chameleon
Metabolic bone disease: a soft or rubbery jaw, swollen or bowed limbs, tremors, weakness. Caused by missing calcium, D3 or UVB; fully preventable. Impaction: straining, no droppings, a swollen belly; from loose substrate, oversized insects or an enclosure too cool to digest in.
GeckosTail loss. Never hold a gecko by its tail. A leopard gecko regrows one; a crested gecko never does. A leopard gecko's tail is also its fat store, so a thinning tail is an early sign of weight loss.
Female lizardsEgg binding. Leopard geckos, bearded dragons and veiled chameleons can produce eggs with no male present. Restless digging with no eggs laid, straining or lethargy needs a vet. Give females a laying site; the species guide explains how.
Same-day vet, any species

Open-mouth breathing, or bubbles or mucus at the nostrils. Tissue protruding from the vent. A burn, a bleeding wound, or a swollen jaw. An animal that cannot right itself when turned over, or that is limp and unresponsive. A female straining with no result, or one that has stopped part-way through laying.

If you can no longer keep it

Rehome it properly, with its records

Circumstances change, and rehoming an animal you can no longer care for well is a responsible decision. Doing it badly is not.

  • Never release it. It is illegal and the animal will die.
  • Pass on the records: feeding log, weight history, shed history, genetics, vet history and the full setup with temperatures. With records, the next keeper can look after it properly from day one.
  • Sell or rehome through bask, where the buyer confirms they are 18 or over and the sale follows bask's collection rules. Adverts offering an animal "free to good home" are not allowed.
  • Ask the buyer questions too. Have they kept the species before? Is the enclosure already running? Who is their vet?
  • If the animal is a prohibited morph, or no buyer comes forward, contact a reptile rescue or ask your exotics vet for a recommendation. Prohibited morphs cannot be advertised on bask, including to rehome them.

Reviewed 16 September 2026. This guide isn't veterinary advice. If your animal shows signs of illness, it needs an exotics-experienced vet. Read PAAG's buying advice alongside it before you commit to an animal. PAAG

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