Common Green Iguana Health Issues

Green iguana health problems trace back overwhelmingly to husbandry, and one condition in particular is common enough in this species that understanding it should shape every other decision you make about care.

Metabolic Bone Disease (MBD)

This is the defining health issue for pet iguanas. VCA Animal Hospitals describes MBD as probably the most common medical problem in captive iguanas, and LafeberVet lists lizards among the groups where it's most commonly seen. Watch for a swollen or rubbery lower jaw, swollen or bowed hind limbs, soft bones, tremors, and an inability to lift the trunk while walking. Caused by low dietary calcium relative to phosphorus, insufficient vitamin D3, or inadequate UVB exposure. Always see a vet, advanced cases need immediate, long-term treatment, and prevention through correct UVB, calcium, and diet ratio from day one is genuinely the difference between a healthy iguana and a statistic.

Kidney Disease

Linked to husbandry failures: chronic dehydration from low humidity, too much animal protein in a diet that should be strictly plant-based (no insects, no dog or cat food, no eggs, ever), and over-supplementing vitamin D, which VCA Animal Hospitals notes can itself cause severe kidney damage. Always see a vet.

Mouth Rot, Respiratory Infection, and Skin or Fungal Infections

All linked to poor husbandry, temperatures running too low, or humidity that's mismanaged. See a vet for any of these, they need professional treatment rather than home correction alone.

Egg Binding (Ovostasis)

A genuine reproductive emergency in females. As VCA Animal Hospitals notes, most pet reptiles seen for this are single females with no exposure to a male. This is always an emergency, get to a vet immediately if you suspect it.

Thermal Burns and Substrate Impaction

Manageable and entirely preventable. LafeberVet notes that pet reptiles commonly get burned by poorly protected heat sources, so burns come from heat sources positioned where the iguana can contact them directly, and impaction comes from ingesting substrate that's too fine while feeding.

The Husbandry Pattern Worth Remembering

Nearly everything on this list traces back to getting UVB, calcium, humidity, and diet right from the start. MBD specifically, the most common and most serious issue here, is described by veterinary sources as highly preventable. Given how routinely this species is under-cared-for, treating these basics as non-negotiable rather than optional is genuinely what separates a thriving iguana from the far too common alternative.

If preventable, husbandry-driven health issues are a new concept, our Savannah Monitor health issues guide covers the exact same pattern in a similarly demanding large lizard.

Sources & Further Reading