Crested Gecko Mouth Rot: Signs, Causes, Care & Prevention

Crested gecko mouth rot is also known as Ulcerative Stomatitis or Infectious Stomatitis in reptiles. If detected in time, it is preventable and treatable. However, if your gecko does not receive prompt treatment, this sickness can spread to the lungs, digestive tract, and could be fatal in some situations.

By examining crested geckos mouth rot symptoms such as excessive salivation and cuts in the mouth, you can discover this infection early and speed up the healing. The good news is that if caught early, this ailment can be treated and monitored easily.

If your crested gecko has mouth rot and you are concerned about its health, you should prepare to take action. This article will describe the symptoms and causes of mouth rot in crested geckos, which will help you understand this infectious disease.

Signs and symptoms of mouth rot in crested geckos:

The indicators of mouth rot in crested geckos are as follows. It is critical that if you notice any of the symptoms of mouth rot, you act fast to assist your gecko recover.

• Appetite loss

• Inadequate water intake

• Cuts around the mouth

• Food trapped between teeth

• Pus or dead tissue in the area surrounding the mouth

• Excessive salivation

• Inflamed oral tissues or gums

• Swelling of the face and head ( in advanced cases)

• Inability to close mouth

• Inflamed oral tissues and gums

• Increased mucus production in the oral cavity

• Reduced or non-existent tongue flicking

• Oral tissues that are red

• Pneumonia could develop (in advanced cases)

Mouth rot in crested geckos is caused by the following factors:

Mouth rot in crested geckos can occur for a variety of reasons. Mouth rot can be caused by a lack of humidity, a weakened immune system, and bacteria in the mouth. Other plausible explanations include:


Leading cause of mouth rot in crested geckos. If your gecko is stressed, its immune system will not operate properly, putting it in danger of contracting various bacteria, viruses, or fungi.

Incorrect temperature:

If the temperature inside the crested gecko terrarium is not optimal, your gecko’s health may decline and develop mouth rot.


If your crested gecko exhibits odd faeces and vomiting, this indicates that he has parasites in his gut. These parasites cause a variety of infectious disorders, including mouth rot.


If your crested gecko gets aggressive and continuously rubs his head or snout on the tank walls, bacteria, and viruses such as Pseudomonas, Salmonella, Aeromonas, and Klebsiella can enter the body and cause infection.

Inadequate nutrition:

Poor nutrition such as a lack of vitamin C and inadequate calcium/phosphorus levels can cause mouth rot.


Chewing on a poor substrate, such as coconut fibre, can potentially induce infection and mouth rot.

Improper habitat:

If your gecko is unhappy with its environment, it may experience stress and impair its immune system, leading to infections such as mouth rot.

How to diagnose crested gecko mouth rot?

It is critical to accurately diagnose problems in your reptiles, such as mouth rot. If it is not recognized in a timely manner, it may go untreated, and injured oral tissue may extend to deeper tissues, including the bones.

If your gecko has mouth rot, you should take them to the vet to be diagnosed. Your vet may examine the history of your gecko’s living conditions, such as temperature, diet, and so on, and may perform a physical exam to determine the reason of mouth rot.

In severe situations, additional testing may be performed:

• An X-ray of the head and body to see whether any other organs or bones are compromised.

• Blood and plasma tests can be performed to rule out any irregularities.

• Bacterial culture and sensitivity tests can be used to determine whether bacteria are present.

• A biopsy can be performed to determine whether or not tumors have formed around the mouth. In that instance, the veterinarian may need to perform a biopsy of the afflicted tissue.

• A fungal isolation test can be performed to determine whether or not fungus is present in the tissue.

• If any of the cells are inflamed, cytology can be performed.

Crested gecko mouth rot treatment:

If mouth rot is detected early, the first step is to take your pet to the veterinarian. The vet will examine your crested gecko thoroughly to determine the cause of the mouth rot.

• The veterinarian will treat them with antibiotics or antifungal medications, as well as clean their mouth.

• If the mouth rot is severe, surgery or oral antiseptic may be required to remove any damaged tissues. To treat infectious mouth illness, proper medication should be administered.

• If the vet determines that the mouth rot is caused by a poor diet, he may prescribe more vitamins and minerals. The extra calcium may help to prevent tooth decay and strengthen your gecko’s jawbones.

Prevention of mouth rot in crested geckos:

Mouth rot in crested geckos may recur after treatment. As a result, the following precautions must be taken to ensure illness prevention:

Habitat setup:

Try to create an environment that is suitable for your gecko. The tank should be large enough, with a suitable water bowl, food sources, and hiding spots.

Read more on crested gecko habitat.

Humidity and Temperature levels:

The temperature in the tank should be around 72 to 75 degrees Fahrenheit and humidity levels at 60% during the day and 80% at night. The unsuitable temperature and humidity in the tank may cause infectious diseases such as mouth rot.

Read more on how to lower humdity in crested gecko tank.


To achieve stronger bones and a healthy body, the gecko’s diet should be enriched with minerals, vitamins, and calcium.


To prevent mouth rot, your gecko’s tank should be cleaned everyday and deep cleaned once a month.


Select a suitable substrate, such as paper towels or newspapers, because chewing on bedding/material substrate or coconut fibres might induce mouth rot.

Read more on crested gecko substrate.

Final thoughts:

The best strategy to avoid mouth rot in crested geckos is to provide a healthy diet, suitable humidity/temperature conditions, and tank cleanliness.

Take your crested gecko to the vet as soon as you find the source of the mouth rot. Maintain optimal habitat conditions for your gecko and keep an eye out for signs of mouth rot.

It is critical to understand that crested gecko mouth rot is a serious condition that must be treated as soon as possible. Otherwise, it can lead to death.

I am the editor-in-chief at, a site that is devoted to reptiles and the people who love them. I have been keeping and breeding many pet reptiles such as bearded dragons, geckos, chameleons, etc. for over 10 years now.

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