Crested Gecko Ulcerative Stomatitis: Severe Mouth Rot in Crested Geckos

Quick Answer
  • Ulcerative stomatitis, often called mouth rot, is a painful infection and inflammation of the mouth tissues that can spread into the jaw in severe cases.
  • Common signs include drooling, thick mucus, red or bleeding gums, white or yellow debris in the mouth, reduced appetite, weight loss, and trouble catching or swallowing food.
  • Poor husbandry, chronic stress, mouth trauma, retained shed around the face, and secondary bacterial overgrowth often work together rather than one single cause.
  • Early veterinary care usually gives the best outlook. Delays can lead to jawbone infection, dehydration, and secondary respiratory or gastrointestinal illness.
  • Typical 2026 US cost range is about $150-$450 for mild cases, $400-$900 for moderate cases needing diagnostics and medications, and $900-$2,000+ for severe cases needing sedation, debridement, imaging, or hospitalization.
Estimated cost: $150–$2,000

What Is Crested Gecko Ulcerative Stomatitis?

Ulcerative stomatitis is a serious inflammation and infection of the tissues lining a crested gecko's mouth. Pet parents often hear it called mouth rot. Early disease may look like tiny red spots, mild gum swelling, or sticky saliva. As it progresses, the mouth can develop ulcers, caseous debris, pus-like material, and dead tissue along the gumline and tooth rows.

In reptiles, mouth rot is usually not a stand-alone problem. It often develops when normal mouth bacteria take advantage of stress, injury, poor environmental conditions, or another underlying illness. In severe cases, the infection can extend deeper into the jawbones, making eating painful and recovery more involved.

For crested geckos, this matters quickly because they are small, can dehydrate fast, and may stop eating when the mouth hurts. A gecko that refuses food for several days, loses weight, or has visible oral lesions should be seen by your vet promptly. Early treatment is often less invasive and less costly than waiting until the disease is advanced.

Symptoms of Crested Gecko Ulcerative Stomatitis

  • Red, inflamed, or bleeding gums
  • Thick saliva, mucus, or stringy drool around the mouth
  • White, yellow, or gray debris inside the mouth
  • Visible ulcers, sores, or dead tissue on the gums or oral lining
  • Reduced appetite, dropping food, or trouble swallowing
  • Weight loss or a thinner tail base from poor intake
  • Swelling of the lips, jaw, or face
  • Lethargy, weakness, or dehydration

Mild redness can be easy to miss in a crested gecko, so behavior changes often matter as much as what you see in the mouth. If your gecko is licking less, refusing favored foods, rubbing the face, or keeping the mouth slightly open, those can be early warning signs.

See your vet promptly if you notice oral discharge, visible sores, swelling, weight loss, or trouble eating. See your vet immediately if your gecko cannot close the mouth, has marked facial swelling, seems weak or dehydrated, or has stopped eating long enough that body condition is dropping.

What Causes Crested Gecko Ulcerative Stomatitis?

Ulcerative stomatitis is usually multifactorial, meaning several problems combine to trigger it. In reptiles, bacteria that normally live in the mouth can become opportunistic when the immune system is stressed or the mouth lining is damaged. Merck notes that infectious stomatitis occurs in lizards, snakes, and turtles, and severe cases can spread into the jawbones.

For crested geckos, common contributors include mouth trauma from feeder insects, rubbing on enclosure surfaces, bites from cage mates, retained shed around the face, poor sanitation, and chronic stress. Environmental mismatch also matters. Crested geckos do best with moderate temperatures and high humidity; overheating, dehydration, or unstable humidity can weaken normal defenses and make healing harder.

Underlying illness can also set the stage. Parasites, metabolic bone disease, poor nutrition, and other systemic problems may reduce appetite and immune function. That is why your vet may look beyond the mouth itself. Treating the visible sores without correcting husbandry or hidden disease can lead to relapse.

How Is Crested Gecko Ulcerative Stomatitis Diagnosed?

Diagnosis starts with a careful history and physical exam. Your vet will ask about enclosure temperatures, humidity, UVB exposure, diet, supplements, recent shedding, cleaning routine, and any recent injuries or feeder changes. In reptiles, husbandry details are often part of the medical workup, not an extra detail.

A mild case may be diagnosed from the oral exam alone, but moderate or severe disease often needs more testing. Depending on what your vet finds, recommended diagnostics may include oral cytology, bacterial culture, fungal testing when indicated, and skull radiographs to check for deeper infection or jawbone involvement. In some cases, sedation is needed so the mouth can be examined thoroughly and painful debris can be removed safely.

Your vet may also recommend fecal testing, blood work, or other diagnostics if your gecko seems thin, weak, or chronically unwell. That broader approach helps identify why the stomatitis developed and which treatment tier makes the most sense for your gecko's condition and your family's goals.

Treatment Options for Crested Gecko Ulcerative Stomatitis

Spectrum of Care means you have options. Here are treatment tiers at different price points.

Budget-Conscious Care

$150–$450
Best for: Early, mild cases in an otherwise stable crested gecko that is still eating some and has no obvious jaw swelling.
  • Office exam with husbandry review
  • Basic oral exam
  • Topical antiseptic or medicated mouth care directed by your vet
  • Systemic antibiotic when appropriate
  • Environmental correction plan for temperature, humidity, sanitation, and stress reduction
  • Assisted feeding and hydration guidance if still swallowing safely
Expected outcome: Often fair to good if started early and husbandry problems are corrected quickly.
Consider: Lower upfront cost, but less diagnostic detail. Hidden bone infection, resistant bacteria, or another underlying disease may be missed.
Most Common

Recommended Standard Treatment

$400–$900
Best for: Most crested geckos with visible ulcers, discharge, appetite loss, or recurrent disease.
  • Exam with detailed husbandry assessment
  • Sedated oral exam if needed for comfort and visibility
  • Debridement or removal of caseous debris
  • Cytology and/or bacterial culture
  • Targeted systemic medication plan
  • Pain control when indicated
  • Skull radiographs if deeper infection is suspected
  • Recheck visit to monitor healing and appetite
Expected outcome: Good in many cases when treatment is started before extensive jaw involvement develops.
Consider: Higher cost and more handling, but gives better information for targeted treatment and lowers the chance of incomplete care.

Advanced / Critical Care

$900–$2,000
Best for: Severe mouth rot, jaw swelling, suspected bone infection, marked weight loss, dehydration, or cases not responding to first-line care.
  • Urgent or specialty exotic animal evaluation
  • Anesthesia or deeper sedation for full oral exploration
  • Aggressive debridement of necrotic tissue
  • Advanced imaging or repeated radiographs when osteomyelitis is suspected
  • Hospitalization for fluids, thermal support, and nutritional support
  • Injectable medications and intensive supportive care
  • Biopsy or additional infectious disease testing in atypical or nonhealing cases
  • Multiple follow-up visits
Expected outcome: Guarded to fair, depending on how much tissue and bone are involved and how quickly the gecko responds.
Consider: Most intensive and costly option, but may be the most practical path when the gecko is unstable or the infection is deep.

Cost estimates as of 2026-03. Actual costs vary by location, clinic, and individual case.

Questions to Ask Your Vet About Crested Gecko Ulcerative Stomatitis

Bring these questions to your vet appointment to get the most out of your visit.

  1. How severe does the mouth disease look right now, and do you see any signs that it may involve the jawbone?
  2. Does my crested gecko need sedation for a full oral exam or cleaning, or can we start with awake treatment?
  3. Would cytology, culture, or radiographs change the treatment plan in this case?
  4. What husbandry factors in my enclosure may have contributed to this problem?
  5. Is my gecko safe to keep eating on its own, or do I need to assist with feeding and hydration?
  6. What signs would mean the current treatment is not working and we need to escalate care?
  7. How often should I do mouth care at home, and what products are safe to use exactly as directed?
  8. What is the expected cost range for the next step if my gecko does not improve?

How to Prevent Crested Gecko Ulcerative Stomatitis

Prevention starts with husbandry. Crested geckos need stable temperatures, appropriate humidity, clean water, and a sanitary enclosure. Current care guidance commonly recommends a warm side around 72-75 F, a cooler range around 68-75 F, and avoiding prolonged temperatures above 80 F. PetMD also recommends humidity around 70-80% for crested geckos. A digital thermometer and hygrometer are worth using every day.

Good oral health also depends on reducing trauma and stress. Avoid overcrowding, do not house males together, remove sharp décor, and supervise feeder choices so insects are not left to bite at your gecko. Promptly address retained shed around the face and mouth, and clean food and water dishes daily.

Routine observation helps catch problems early. Watch for subtle appetite changes, sticky saliva, or redness around the gums after sheds and during stressful periods. If your gecko has had mouth rot before, ask your vet whether scheduled rechecks or a husbandry review would help lower the risk of recurrence.

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