Common Corn Snake Health Issues and What Causes Them

Corn snakes are one of the hardier pet snakes, and nearly every health problem they develop traces back to husbandry rather than bad luck. Get temperature, humidity, and substrate right, and this list mostly stays theoretical.

Respiratory Infection

The most common issue in pet corn snakes, usually bacterial and almost always secondary to an enclosure that's too cold or too damp.

Watch for: open-mouth breathing, wheezing or an audible clicking sound, mucus or discharge around the nose or mouth, and lethargy.

This needs a reptile vet and prescription antibiotics, not a wait-and-see approach. Left untreated it can become serious quickly.

Scale Rot (Necrotic Dermatitis)

A bacterial infection of the belly scales, usually caused by damp or dirty substrate, or a water bowl that's been overflowing or sitting unchanged too long.

Watch for: discolored belly scales (brown, yellow, or black), skin that looks soft, mushy, or blistered, and a foul smell. Fix the underlying husbandry issue and see a vet, especially if it's spreading.

Mites

Look for tiny black or red specks moving on your snake's scales or floating in the water bowl. Mites cause irritation and, in significant infestations, anemia and real stress on the animal. Treating the snake alone isn't enough, the whole enclosure needs to be treated at the same time or the infestation just comes back.

Retained Shed (Dysecdysis)

Almost always a humidity problem. Look for patches of skin, or retained eye caps, that didn't come off cleanly during a shed. A humid hide with damp sphagnum moss available during shed cycles prevents most of this.

Mouth Rot (Infectious Stomatitis)

An infection of the mouth tissue. Signs include swollen or reddened gums and visible discharge. This needs veterinary treatment rather than home care.

A Few Other Things to Watch For

• Regurgitation usually comes from handling too soon after a meal or an enclosure that's running too cold for proper digestion.
• Obesity is a real risk from overfeeding, corn snakes don't need to eat as often as new owners sometimes assume.
• Internal parasites show up as weight loss and diarrhea despite normal eating.
• Neurological signs like star-gazing (holding the head tilted up and back) or corkscrewing movements are rare but serious, and warrant an immediate vet visit.

When to See an Exotic Vet

Get a new corn snake checked within the first few weeks of ownership, and plan on an annual wellness exam with a fecal test after that. See a vet promptly for open-mouth breathing or wheezing, visible mites, discolored or soft belly scales, repeated regurgitation, any mouth swelling or discharge, or neurological symptoms. A reptile-experienced vet found through the Association of Reptilian and Amphibian Veterinarians is worth locating before you actually need one.

Diet related problems like regurgitation and obesity are common too. The feeding guide has the prey sizing and the schedule that prevent both.

Sources & Further Reading