Stomatitis (mouth rot) is a highly progressive bacterial infection that should be taken very seriously. Veterinary assistance at the earliest possible signs of stomatitis is critical for successful reversal and recovery.
Effective treatment begins with a culture of the infected area to help identify the most effective anti-biotic needed. Along with a proper and complete anti-biotic regimen, twice daily rinsing of the infected area with betadine or hydrogen peroxide is also prescribed. In severe cases, a topical anti-biotic is sometimes recommended.
Proper hydration is also critical especially while administering a course of anti-biotics.
This is definitely not a disease to be taken lightly. If treated improperly, the infection can quickly move from the soft tissue inside the mouth into the jaw bone and then turn systemic. The earlier the animal can be seen by a veterinarian experienced in treating reptiles, the better it's chances for a full recovery.
Hope this helps.
-adam