Anal gland abscesses are a painful and common problem in dogs. They usually begin when an anal gland becomes blocked, irritated, and infected. Dogs with an anal gland abscess may scoot, lick under the tail, strain, or suddenly develop swelling and drainage near the anus. Dr. Roger Hart at Bushnell Animal Clinic explains the signs of anal gland abscesses in dogs, what causes them, and how they are treated.