I think possibly that my cat has broken or hurt his tail joint. It is swollen and tender to the touch. His hips and legs are fine. But if you feel or touch the beginning of his tail you can feel a knot like it's swollen. Is there anything you can do or should do to help him?
Yes, you should bring your pet to the vet b/c there is something they can do if it is broken. It may need to be splinted, or sometimes amputated. It may also be an abscess. Good luck, vetcare