Yes, bearded dragons have a natural tendency to open their jaws when basking in the sun or looking to maintain their body temperature. However, if your lizard is gaping its mouth more frequently than usual, it could be a sign of a more serious health problem.
If you notice any other symptoms, such as weight loss or lethargy, it is important to take your lizard to the veterinarian for a check-up.
Bearded dragons are prone to respiratory infections, which can threaten their health if left untreated. So, if you think your lizard might be sick, don't hesitate to reach out to a professional for help.