Other issues that may cause lumps or bumps on your pet include sebaceous cysts that are essentially just clogged oil glands which will resolve on their own. (ltbhs.com)
Skids Mixed Terrier Ohio Diagnosis: Cutaneous sebaceous cysts and lipomas Treatment: Surgical removal and treatment (paws4acure.org)
My last Cocker had several sebaceous cysts — they burst and were subsequently removed under a twilight anesthesia. (fidoseofreality.com)