Turtles, especially box turtles and aquatic species, are at risk for developing ear infections. Because a turtle’s eardrum is located on the outer surface of its head, infection is trapped underneath the membrane and forms an abscess.
The underlying causes of aural (or ear) abscesses are not completely understood, but some cases develop when turtles are forced to live in dirty environments, are exposed to improper temperature and humidity levels, and/or do not receive adequate amounts of vitamin A in their diets.
Veterinarians diagnose aural abscesses based on a turtle’s symptoms, a physical exam and medical history.

thanks for the article. great!! Problem solved I had notice white spots near my pet alligator snapper's ear.