Hello! I have a Red-Eared Slider named Shelldon Leo Kooper!
She is a (nearly) 13 year old RES, Female. 75 Gallon Tank, With Underwater heating at around 78, and UVB and Basking Lightning. She has been eating and basking regularly. Her filter system is a Fluval 407 which cleans the water very effectively.
Today I was examining her and noticed she had an odd what looks like a pimple or blemish on her tail. It isn't particularly large or anything, but it still worries me. I contacted her veterinarian, but any information or advice would help. A friend thinks that it may be a small abrasion.
I did do a full water change three days ago.
The only thing I can think of is that Shelldon possibly scratched her tail with her hind-legs. I remember she did something similar with her front legs to her plastron, which healed quickly.
Thank you.