Why does my box turtle have lumps on her shell? What should I do?
Hi, you’re right, the lumps are difficult to see in the photos. Lumps on or in a turtle shell can be from a number of things. There can be an underlying metabolic issue like metabolic bone disease (lack of UVB light and imbalance of calcium/phosphorus), or pyramiding, which can be from high protein and low humidity. Infections (bacteria, fungus, some parasites) can also cause shell lumps. Because these issues are all so different, it’s important to have Cookie examined by a veterinarian so they can do some tests and get her on the best treatment, if indicated. Good luck!
Updated on September 23rd, 2025