Dear Dr. Jorden: My dog is 9 years old and has started getting hard, marble-sized lumps under the skin. Some have ruptured. My vet says they are sebaceous cyst. Why have they suddenly started growing ...

A wide variety of skin lumps, bumps, and tags are encountered in dogs, especially as they age. They can arise from many different cells or structures in the skin like the oil glands and hair follicles ...

As pets age, owners may start to notice lumps, bumps or skin growths. Some are visible, but some can be under the skin. While new growths might be easy to see on a short-haired breed, they may not be ...