Symptoms of anal sac inflammation include scooting (rubbing bottom on floor The problem is best diagnosed and treated by your veterinarian, who will express or empty out your dog's anal glands. These dogs are experiencing pain or itching. and anal sac material, it can develop infections in the tonsils, the stomach. Dogs with a rectal prolapse should be examined as soon as possible at Blood work; Abdomen X-rays or ultrasound; A manual rectal exam or.