It has no age or sex predisposition, but it may be more common in some smaller breeds. Dogs have two anal glands. Normally you will not be able to see these glands. If they get impacted or infected, then you will probably see them as a small swelling in those positions.
Scooting Bum Across the Floor. What are Anal Glands? The anal glands are located between the internal and external anal sphincters the muscles that control the passage of stool from the rectum. The glands store and secrete a strong-smelling, oily substance that is used for marking territory. What are Anal Glands Used for?
Traditionally, owners attributed that to "worms". But "worms" are almost never the cause of this problem unless those intestinal parasites are causing chronic diarrhea as well. The misinformation about worms got started because humans get pinworms. Pinworms do often cause your rear to itch.
About Us Poor Diesel has an irritated bottom Diesel is a lovely a young Miniature Schnauzer who came in to see us for an irritated bottom. He had been licking at his back end and dragging it across the floor while sitting - commonly referred to as "scooting". He also seemed to be toileting less.