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My bearded dragon has a yellow spot on its back. Is it serious?

Updated On September 23rd, 2025

My bearded dragon has a yellow spot on his back and has had it for a few months now. He is eating well and is not acting strangely. It has gotten smaller as time goes on but I am still worried.

1 Answer

Most Helpful Answer

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Answered By Emi Knafo, DVM, DACZM

Veterinarian, Board-Certified Zoological Medicine Specialist

Published on December 3rd, 2017

Hello, The yellow spot could be caused by several things like fungus, bacteria, or a skin mass. The fact that it’s getting smaller is good! Without an exam, I can’t tell you for sure what t is. However, I would be worried about something called “yellow fungus disease.” This is a potentially serious fungal infection common in bearded dragons. Diagnosis can be done by your veterinarian by way of a biopsy and culture of the affected skin. Sometimes, this infection spreads to other organs and can kill the dragon. Since you describe a small lesion, I would expect that if this in fact what’s going on, treatment would have a good chance of working. Therefore, I recommend taking Stalin to see a vet very soon so you can diagnose and treat early for the next chance of success. Good luck!

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