Stomatitis (Mouth Rot) in Reptiles

What Is Stomatitis?

Stomatitis—often called “mouth rot”—is an infection and inflammation of the oral tissues in reptiles. It can affect the gums, teeth, tongue, and even the underlying bones of the jaw if left untreated.

Stomatitis is one of the most common bacterial infections seen in snakes and lizards, and it often develops when a reptile’s immune system is weakened by stress, poor husbandry, or other illness.

Causes

Most cases are caused by opportunistic bacteria, usually gram-negative organisms, that take advantage of breaks in the mouth lining or a weakened immune system.

Common predisposing factors include:

• Poor husbandry: Inappropriate temperature, humidity, or hygiene

• Nutritional deficiencies: Especially Vitamin A deficiency in lizards

• Oral trauma: Snout rubbing, cage striking, or fighting

• Systemic illness: Upper or lower respiratory infections, metabolic bone disease (NSHP)

• Retained shed: Dysecdysis can trap debris and bacteria around the lips

Fungal, viral, or even cancerous causes are less common but possible.

Clinical Signs to Watch For

Signs of stomatitis may include:

• Swelling of the mouth, face, or lips

• Stringy or thick saliva (“drooling”)

• Pus or blood in the mouth

• Red, swollen gums or exposed oral tissue

• Asymmetry of the jaw or face

• Lethargy or anorexia (refusing to eat)

Because this infection can quickly worsen, any of these signs should be taken seriously.

Diagnosis

Your veterinarian may recommend:

• Physical exam and oral inspection

• Bloodwork to check for infection or organ dysfunction

• Culture or biopsy if infection is severe or not responding to treatment

• Radiographs (X-rays)if bone infection (osteomyelitis) is suspected

These tests help determine the severity of the disease and the best treatment plan.

Treatment

Treatment focuses on eliminating infection, reducing inflammation, and correcting underlying husbandry issues.

Typical treatments include:

• Prescription Antibiotics:

• Non-steroidal Anti-inflammatories to reduce pain and swelling

• Daily oral cleansing gels (e.g., Maxi/Guard) for lizards until healed

• Vitamin A supplementation

• Hydration: Subcutaneous fluids or regular soaks

• Assist feeding: If the reptile refuses to eat during recovery

• Husbandry changes: More hiding spots, proper temperature/humidity, and visual barriers to reduce snout rubbing

Severe cases may require surgical debridement under anesthesia to remove infected tissue or bone.

Prognosis

The outlook is generally good if treated early. However:

• Untreated cases can progress to bone infection, which requires aggressive therapy.

• Some reptiles may need lifelong oral care to prevent recurrence.

• Chronic or advanced cases can be more difficult to treat successfully.

Home Care & Prevention

• Keep the enclosure clean and disinfected.

• Ensure proper temperature, humidity, and UVB lighting(for lizards).

• Provide a well-balanced diet, with correct supplementation.

• Offer visual barriers or more hides to reduce stress and snout rubbing.

• Monitor your reptile’s mouth regularly for early signs of swelling or discharge.

When to See Your Veterinarian

Make an appointment right away if you notice:

• Swelling, pus, or blood in the mouth

• Excessive drooling

• Your reptile refuses to eat or becomes lethargic

Prompt care improves recovery and helps prevent long-term complications.

Tree of Life Exotic Pet Medical Center
📞 480-530-0370
🌐 www.treeoflifeexotics.vet
Our experienced team is here to help your reptile recover from stomatitis and get back to eating and thriving.