There may be many reasons why a dog’s anus becomes enlarged, some of the common reasons include: Anal gland problems: There are two small glands near the dog’s anus, called anal glands, which secrete a Special smelling liquid. If these glands become infected or blocked, the anus can become swollen or painful. Constipation or diarrhea: If your dog does not defecate for a long time, or the anus is overly dilated during diarrhea, it may cause the anus to become swollen.
Anal fissure or anal fistula: Anal fissure refers to a split in the skin around the anus, while anal fistula is a tear leading to the anus. Glandular ducts that can cause the anus to become swollen or painful. Tumors or other anal diseases: Tumors or other diseases around the anus may also cause the anus to become enlarged. If you notice that your dog's anus is enlarged, it is recommended to contact your veterinarian for an examination as soon as possible to determine the specific cause and receive appropriate treatment.
