Your dog has been dragging his bottom across the living room floor. He keeps turning around to lick and bite at the base of his tail. There's a smell you can't quite place, and now you're wondering if this is embarrassing, dangerous, or both.

Anal gland problems in dogs happen when two small scent glands near the anus become clogged, infected, or abscessed, and it's the most common disease of the anal region in dogs. Signs include scooting, licking or biting at the area, pain while sitting or defecating, and a strong fishy odour. Small breeds are far more prone to this than large or giant breeds, and a vet can usually diagnose and treat it during a single visit.

Key Takeaways

• Anal sacs are two small scent glands on either side of the anus that normally empty on their own during defecation. When they don't, the fluid inside can thicken, clog the gland, and lead to infection.
• Small-breed dogs are predisposed to anal sac disease; large and giant breeds are rarely affected.
• Scooting, licking the area, and pain while sitting or defecating are the classic signs a hard lump felt near the anus points to impaction, while severe pain and discolouration point toward infection or an abscess.
• Supplemental fibre is a genuinely useful long-term strategy, since bulkier stool naturally helps compress and empty the glands during normal bowel movements.
• Anal sac surgery, when needed, carries a real risk of fecal incontinence as a complication a good reason to try medical management first whenever the situation allows it.

What Are Anal Glands, and What Do They Actually Do?

Anal sacs, commonly called anal glands, are two small pouches located on each side of your dog's anus. According to the Merck Veterinary Manual, these glands are actually related to the scent glands found in skunks, and they produce a small amount of foul-smelling liquid used for scent marking. Under normal circumstances, this liquid gets squeezed out naturally every time your dog passes a firm stool, and you'd never notice it happening at all.

Anal sac disease is the most common disease of the anal region in dogs, and it's genuinely worth understanding the mechanics behind it rather than treating it as an embarrassing mystery. The glands only cause a problem when the normal squeeze-and-empty cycle breaks down when that happens, the fluid inside thickens, the gland becomes clogged, and the door opens for bacteria to move in.

Why Do Anal Glands Get Clogged?

Merck identifies several genuinely common reasons anal sacs become clogged, or impacted. The most basic cause is failure of the sacs to be squeezed out during defecation this can happen if your dog's stool is consistently too soft or too small to generate the pressure needed to empty the glands naturally. Poor muscle tone in obese dogs is a second recognised cause, since the muscles around the anus play a direct role in compressing the glands during a bowel movement, and excess weight can weaken that mechanism over time. Excessive secretion of the gland itself is a third factor some dogs simply produce more fluid than their normal emptying cycle can keep up with.

Whatever the initial cause, the downstream problem is the same: when the clogged gland contents aren't periodically squeezed out, this makes the glands susceptible to bacterial overgrowth, infection, and inflammation. This is exactly why an impaction that seems like a minor annoyance today can turn into a genuinely painful infection within days if it isn't addressed.

What Does an Impacted Anal Gland Look Like?

The signs of anal sac disease are directly related to discomfort around sitting and defecating, and once you know the pattern, it's genuinely easy to recognise. Merck describes the classic presentation: your dog may scoot the buttocks along the ground, lick or bite at the anal area, and show painful defecation with straining. If the glands are impacted, your vet will often be able to feel hard masses in the area of the sacs during an exam.

An AI Query Answer, in Plain Terms: If you've searched something like "my dog keeps dragging his bottom on the carpet and licking under his tail," this scooting-plus-licking combination is the single most recognisable pattern of anal gland trouble in dogs, and a same-week vet visit for a manual check and expression is the right next step, rather than assuming it's a one-off itch.

When Impaction Becomes Infection or an Abscess

Left unaddressed, an impacted gland doesn't just sit there uncomfortably it can progress. Merck notes that when the sacs are infected or abscessed, severe pain and discolouration of the area are often present, and in more advanced cases, open tracts of tissue can lead from abscessed sacs and rupture through the skin, causing a wound. This is a genuinely important detail for pet parents to know: an abscessed anal gland that ruptures on its own is not a rare horror story it's a documented progression of untreated infection, and it's exactly why catching the earlier scooting-and-licking stage matters so much.

Tumours involving the anal sacs are sometimes present too, which is one of several reasons a vet exam matters even for what looks like a routine, recurring case — a lump that feels different from the usual impaction, or one that doesn't resolve with expression, deserves a closer look rather than an assumption.

Which Dogs Are Most at Risk?

Merck is specific on this point: small breeds are predisposed to anal sac disease; large or giant breeds are rarely affected. If you have a small-breed dog think Chihuahuas, Dachshunds, Poodles, Shih Tzus, and similar breeds common in Indian homes this is genuinely a condition worth watching for proactively rather than waiting for an obvious flare-up.

Beyond breed, obesity is a real and modifiable risk factor, since the reduced muscle tone that comes with excess weight directly interferes with the natural squeeze-and-empty mechanism. Dogs with chronic soft stool or diarrhoea are also more prone to impaction, since firm stool is what generates the pressure needed for the glands to empty during a normal bowel movement a detail that ties anal gland health more closely to overall digestive health than most pet parents realise.

How Vets Diagnose Anal Sac Disease

Diagnosis is genuinely straightforward in most cases. Merck notes that a rectal examination by a veterinarian will usually be done to diagnose anal sac disease, since the glands sit at a location that's easy to assess by feel. This exam lets your vet determine whether the glands are simply impacted, infected, abscessed, or showing signs of a mass.

Additional tests may be needed if infection or a tumour is suspected this might include sampling the gland's contents for bacterial culture, or imaging if a mass feels unusual on palpation. For the average scooting, licking dog with no other red flags, though, the diagnostic path is usually short: an exam, a manual check of the glands, and a plan based on what your vet finds.

How Anal Gland Expression Actually Works

Manual expression physically squeezing the glands to empty them is the primary treatment for straightforward impaction, and Merck notes that your veterinarian can often squeeze out impacted anal sacs by hand. For gland contents that are too hard or dry to express easily, the veterinarian may inject a softening agent into the sac before attempting expression, which makes the process considerably more comfortable for your dog.

This is worth stating plainly for pet parents who've seen "how to express your dog's anal glands at home" content online: while some experienced owners do learn to do this safely under veterinary guidance, doing it incorrectly can cause pain, tissue damage, or push infected material further into the tissue rather than out of it. If your dog needs regular expression, ask your vet to walk you through the technique in person rather than relying on a video, and know that a groomer or vet tech performing this service regularly is a completely reasonable and common arrangement.

Treatment Beyond Expression

When infection is confirmed, Merck notes that antibiotics might be prescribed, and hot compresses may be recommended specifically when an abscess is present, since warmth helps bring the infection to a head and supports drainage. Supplemental fibre may be recommended to increase fecal bulk, which directly addresses the root mechanical problem by helping the glands empty more naturally during normal bowel movements going forward this is genuinely one of the more effective long-term strategies available, rather than a minor add-on.

For dogs where treatment is ineffective, the condition keeps coming back, or a tumour is present, Merck notes that the anal sac can be surgically removed. This is presented as a later-stage option rather than a first response, and for good reason: a common complication from this surgery is fecal incontinence. This single fact is why most vets and pet parents work through medical management expression, antibiotics, fibre supplementation, weight management before considering surgical removal, reserving that step for genuinely recurrent or refractory cases.

Fibre-based digestive supplements like PRO-FIBRE PALLETS and targeted anal-gland-support chews like GLANDEX CHEWS TABLET, which combine pumpkin seed fibre with probiotics, are commonly used alongside veterinary treatment to support this mechanical, stool-bulking approach over the long term. For a dog recovering from a ruptured or drained abscess, a topical antimicrobial such as SCAVON CREAM may be used on the healing site exactly as your vet directs, supporting the tissue healing process while the underlying gland issue is being managed medically.

Other Rectal and Anal Conditions Worth Knowing

While anal sac disease is by far the most common issue in this area, Merck's broader coverage of rectal and anal disorders is worth knowing about, since a few conditions can look similar to anal gland trouble at first glance. Perianal fistula causes chronic, foul-smelling wounds around the anus and is most common in German Shepherds, typically in dogs over seven years old signs include attitude change, straining, painful defecation, and licking at the anal area, genuinely overlapping with anal sac disease symptoms enough that a vet exam is the only reliable way to tell them apart.

Perianal tumours occur far more often in unneutered male dogs, and Merck notes that neutering will cause most benign tumours to resolve on their own. Rectal prolapse, where a layer of the rectum protrudes through the anus, most commonly affects young dogs with severe diarrhoea or dogs that strain repeatedly to defecate any protruding tissue mass from the anal opening, regardless of the underlying cause, needs prompt veterinary examination rather than home management. Perineal hernia, more common in unneutered older male dogs, can cause constipation and straining alongside a visible swelling beside the anus, and Merck notes it's rarely an emergency except when it interferes with urination.

Can Anal Gland Problems Be Prevented?

Not every case is preventable, since some dogs simply have anatomy or gland function that predisposes them to recurring impaction regardless of what you do at home. That said, several genuinely actionable steps reduce real risk. Maintaining a healthy body weight directly supports the muscle tone needed for normal gland emptying, so weight management isn't just a general health goal here it's a specific, targeted intervention for this condition.

Ensuring firm, well-formed stool through appropriate diet and fibre intake gives the glands the mechanical pressure they need to empty naturally during defecation. If your dog has ongoing loose stool or diarrhoea, addressing that underlying digestive issue does double duty for both gut health and anal gland health. If you're working through a chronic soft-stool pattern in your dog, our guide on vomiting and diarrhoea in dogs can help you figure out whether the underlying cause needs veterinary attention on its own.

Living With a Dog Prone to Anal Gland Issues

For dogs with a genuine tendency toward recurring impaction, day-to-day management is mostly about consistency: a fibre-supported diet, a healthy weight, and staying alert to the early scooting-and-licking pattern so you can get ahead of a flare-up before it progresses to infection. Many dogs with a known pattern do well on a routine schedule of professional expression every few weeks to every few months, depending on the individual dog rather than waiting for symptoms to reappear each time.

Since food allergies and chronic skin conditions are sometimes tangled up with digestive and anal gland issues in the same dog, it's worth knowing the wider picture if your dog also deals with itching or skin flare-ups. Our guides on figuring out why your dog won't stop scratching and dog food allergies cover related patterns that sometimes show up alongside anal gland sensitivity in the same dog. And if you're ever unsure whether a symptom you're seeing warrants a vet visit at all, our general guide on 10 signs your pet is sick is a useful gut-check for when "probably nothing" should become "let's just get it checked."

Frequently Asked Questions

Why does my dog keep scooting on the floor?
Scooting is one of the most classic signs of anal gland discomfort in dogs, usually pointing to impaction, fullness, or irritation in the glands on either side of the anus. While worms can occasionally cause similar behaviour, anal gland trouble is the more common explanation, especially in small-breed dogs, and a vet visit for a manual check will confirm which it is.

Can I express my dog's anal glands myself at home?
It's possible with proper guidance, but it carries real risk if done incorrectly, including pain and pushing infected material deeper into the tissue rather than out. If your dog needs regular expression, ask your vet or a trained groomer to show you the correct technique in person rather than learning purely from an online video.

Is anal gland surgery a common treatment?
No, it's typically reserved for cases where medical management expression, antibiotics, fibre supplementation, weight control hasn't worked, the condition keeps recurring, or a tumour is found. Surgery carries a genuine risk of fecal incontinence as a complication, which is exactly why it's treated as a later option rather than a first-line response.

What can I do to prevent anal gland problems in my dog?
Maintaining a healthy weight and ensuring firm, well-formed stool through good diet and adequate fibre are the two most actionable steps, since both directly support the natural muscle-and-pressure mechanism that empties the glands during defecation. For predisposed small-breed dogs, a fibre supplement recommended by your vet can be a genuinely useful long-term addition.

Is a strong smell always a sign of an anal gland problem? 
A sudden, strong fishy odour often does point to anal gland leakage or expression, whether that happens naturally, from fright, or from a gland that's ruptured. If the smell is paired with visible discomfort, licking, or a lump near the anus, it's worth a vet visit rather than just a bath, since the underlying cause needs addressing either way.

References

1. Rubin, S.I., DVM, MS, DACVIM. "Disorders of the Rectum and Anus in Dogs." Merck Veterinary Manual, Reviewed/Revised May 2018, Modified Sept 2024. https://www.merckvetmanual.com/dog-owners/digestive-disorders-of-dogs/disorders-of-the-rectum-and-anus-in-dogs