Issues with your dragon's respiratory system can be caused by bacteria, a fungus or a virus. Often these issues are caused by feces covered cages, too much humidity and dust from improper substrate.
Photo from google images
Signs that your dragon has a respiratory issue:
- Gulping large breaths of air through the mouth
- Hearing your dragon's breathing
- Consistent puffiness near the dragons throat (not to be confused with display puffing)
- Discharge from eyes, nose and/or mouth
If you suspect your dragon has a respiratory infection seek a reptile vet's assistance immediately.