Dog Anal Gland Care: Symptoms, Causes, Diagnosis, Treatment, and Management Tips

Lifestyle & Age CareDiseasesMeongsiljang Veterinary Advisory Board

A dog’s anal glands release secretions each time they defecate. Without proper care, these glands can become inflamed, infected, and painful.

Dog anal sac issues are health problems caused by impaired secretion expulsion.

Your dog seems uncomfortable after defecating, tucking its tail as if in pain.

Your dog’s anal sacs are small pouches located on either side of the anus, roughly at the 4 o’clock and 8 o’clock positions. They naturally release fluid produced by internal glands during defecation. If this fluid isn’t expelled properly, it can become thicker, causing the sacs to swell and become painful. - Anal sac swelling: This occurs when fluid builds up inside the sacs because it can’t drain properly, leading to swelling. - Pus discharge: If an infection is present, you may notice greenish-yellow or reddish pus-like discharge. - Pain-related behaviors: Swollen anal sacs can cause discomfort when sitting or moving, which may result in your dog being overly cautious with its tail or hindquarters. - Spread of inflammation: If left untreated, anal sac inflammation can progress to an abscess or even rupture. Regular care is especially important for small breeds or dogs with soft stools, as they are more prone to inadequate sac emptying.

The main causes of anal sac issues are stool abnormalities and dietary imbalance.

While the exact cause of anal sac impaction remains unclear, it may be linked to soft stools, gastrointestinal motility disorders such as constipation or diarrhea, obesity, or blockage of the ducts that drain the sacs. - Constipation or diarrhea: Abnormal gut motility that changes stool consistency can interfere with the normal emptying of the anal sacs, leading to impaired drainage. - Obesity: Excess weight can put pressure on the tissues surrounding the anal sacs, making it harder for them to empty properly. - Duct obstruction: If the ducts connecting the anal sacs become blocked, secretions cannot drain and may accumulate. - Dietary management: A balanced diet that supports gut health, along with adequate hydration, can be helpful. In cases of recurrence or soft stools, supplementing with dietary fiber may provide relief. Consistent management of bowel habits is also a key preventive measure.

A small amount of secretion coming from a dog's anal glands

Quickly identify key symptoms and signs.

When anal gland issues arise, you may notice the following signs:

Licking the tail or perineal area: Repeatedly licking or biting around the anus or tail.

Scooting: Dragging the hindquarters along the floor or rubbing the back legs against the ground.

Pain during defecation: Showing signs of discomfort or pain while passing stool.

Pus discharge: If an infection is present, pus-like secretions that are greenish-yellow or reddish may appear around the anus.

Swelling: The area around the anus may become swollen, red, and in severe cases, ulcerated.

If these symptoms persist, a visit to the veterinarian is necessary.

Your puppy is rubbing its hind legs on the ground, showing signs of discomfort.

Symptoms requiring immediate veterinary visit

If the anal sacs rupture or discharge a large amount of pus, or if your pet experiences severe pain or fever, immediate veterinary attention is necessary. These are signs of a progressing infection, and leaving it untreated can lead to abscesses or chronic inflammation. Additionally, if pus discharge recurs, it is important to consult with your veterinarian to discuss the appropriate treatment plan.

Veterinarians perform specialized examinations for accurate diagnosis.

An accurate diagnosis of anal gland issues requires a hands-on examination by a veterinarian. - Visual and rectal examination: The vet checks for swelling, pain responses, or pus around the anus, and may perform a gentle digital rectal exam to assess the condition of the anal glands. - Expression test: The veterinarian expresses the anal glands to evaluate the amount, color, and odor of the secretions, helping to identify the underlying problem. - Secretion analysis: The secretions are examined under a microscope to look for signs of inflammation or infection, such as white blood cells or bacteria. - Imaging studies: If a mass is suspected or the case is severe, imaging tests like ultrasound are used to examine the internal structures. - Additional tests: If a tumor is suspected in the anal glands, blood ionized calcium levels may be checked. An accurate diagnosis allows for the development of an appropriate treatment plan.

A veterinarian examining a dog's anal glands

Treatment methods proceed in stages.

Treatment varies depending on the severity of symptoms.

Mild cases: The veterinarian gently expresses the anal sacs to drain their contents. This procedure is usually quick, but sedation may be required if the sacs are difficult to express.

Inflamed cases: After emptying the anal sacs, antibiotic ointment may be applied or broad-spectrum antibiotics prescribed, with regular expression to help alleviate symptoms.

Cases with pus or infection: Under anesthesia, the anal sacs are flushed with saline solution and antibiotics are administered. Warm compresses can help reduce swelling and pain.

Recurrent cases: The underlying cause is first identified. If episodes are frequent or severe, surgical removal of the anal sacs may be considered. Because surgery carries risks of complications such as fecal incontinence or wound dehiscence, careful postoperative care is essential.

A veterinarian expressing a dog's anal glands by applying pressure.

Home care and prevention are important.

Anal gland care requires consistent attention in your pet’s daily routine.

Dietary Management: If your pet’s stool is too soft or too hard, supplementing with fiber can help improve stool consistency.

Regular Expression: If blockages recur, it is safest to have a veterinarian express the glands periodically. Owners can also learn the proper technique to assist at home.

Weight Management: Excess weight can put pressure on the tissues surrounding the anal glands, so maintaining a healthy weight is important.

Hydration: Adequate water intake supports digestive health and helps maintain proper stool firmness.

Monitoring: Consult your veterinarian promptly if you notice your pet scooting, frequently licking the anal area, or if you observe swelling or discharge.

A puppy showing a healthy anal area during a walk

Breed-specific precautions and tips to prevent recurrence

Small and toy breeds, including Cavalier King Charles Spaniels, are known to be relatively prone to anal gland impaction. Additionally, Cocker Spaniels are a breed in which anal gland tumors (adenocarcinomas) have been reported, so it is advisable to seek prompt veterinary examination if you feel a firm lump around the anus. For these breeds, it is important to work with your veterinarian to establish a regular care plan and consistently maintain gut health, regular gland expression, and weight management to prevent recurrence.

Reviewed by a veterinarian

Dr. Tony — Punnawat Phongkittirak

Veterinarian

A veterinarian who majored in veterinary medicine at Khon Kaen University, Thailand, and completed the IVSA program at North Carolina State University in the United States. Drawing on clinical experience at animal hospitals, he works in the pet healthcare field and is dedicated to building a digital care environment that connects pet parents with veterinarians.

Frequently Asked Questions

How often should anal glands be expressed?

The frequency of expression varies depending on your dog’s symptoms and overall condition, and is typically determined by your veterinarian to be performed periodically when symptoms are present. In cases of recurrent blockages, expression may need to be repeated weekly for three to four weeks.

Can I express my pet's anal glands at home?

Professional skills and hygiene management are required, so it's safer to leave it to a veterinarian at first. If done incorrectly, it can cause damage or infection, and if you want to do it yourself, it's best to learn the proper method from a veterinarian before trying.

Can anal gland problems be completely cured?

With proper care and treatment, most pets show improvement, but the condition can recur. It’s important to identify the underlying cause and focus on preventive management.

When is anal sac removal surgery necessary?

If your pet experiences recurrent inflammation or rupture of the anal sacs, or if conservative treatments prove ineffective, you may consider discussing surgical removal with your veterinarian. However, it is important to identify the underlying cause before proceeding with surgery.

Can anal gland problems be transmitted to other dogs?

No. Anal gland issues are not infectious diseases, so they cannot be transmitted to other dogs.

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References

[1] BSAVA Manual of Canine and Feline Dermatology, 4th Ed. BSAVA Publications, 2020.

[2] The Veterinary Workbook of Small Animal Clinical Cases. Wiley-Blackwell, 2018.

[3] Clinical Medicine of the Dog and Cat, 4th Ed. Elsevier, 2021.