Lick Granuloma in Dogs: A Vet Explains Causes and Treatment

This pet health content about lick granuloma in dogs was written by a veterinarian, Dr. Pippa Elliott, BVMS, MRCVS. Originally published August 2019 and updated March 2026.

If you have questions or concerns, call your vet, who is best equipped to ensure the health and well-being of your pet. This article is for informational purposes only and is not a substitute for professional medical advice, diagnosis or treatment. See additional information.

If your dog has a raw, raised sore on their leg that they just will not leave alone, you are probably dealing with a lick granuloma. It looks alarming, it is frustrating to treat, and it has a stubborn habit of coming back. You tell your dog to stop. They stop. Then they start again the moment you look away.

As a veterinarian, I find lick granulomas to be one of the most challenging conditions I manage in dogs. Not because they are dangerous in the traditional sense, but because they sit at the intersection of physical pain, anxious behavior, and deeply ingrained habit. There is rarely one simple fix.

This guide walks through everything you need to know: what is actually happening when your dog licks that spot, why they cannot seem to stop, which dogs are most at risk, and what treatment actually looks like in practice.

What is a lick granuloma?

A lick granuloma, also called acral lick dermatitis (ALD), is a firm, thickened skin lesion that develops when a dog licks one spot repeatedly over time. The constant friction and moisture from licking breaks down the skin, causes inflammation, and over time creates a wound that is prone to infection.

The name "acral" refers to the extremities. Most lick granulomas appear on the lower front legs, the wrist area, or the top of the paws. You will often notice a hairless patch that looks raw or calloused, sometimes weeping, and almost always red around the edges.

What makes this condition particularly tricky is that even when the wound begins to heal, one licking session can set everything back to square one.

Why do dogs lick until they create a sore?

The answer comes down to brain chemistry. When a dog licks, the body releases endorphins. These are the same feel-good hormones released during exercise or pleasurable activity. The licking feels good, so the dog does more of it, and a feedback loop develops that becomes very difficult to interrupt.

Groundbreaking research by Dr. Nicholas Dodman, BVMS, published in the Archives of General Psychiatry (1992) found that when dogs with ALD were treated with endorphin-blocking drugs, their self-licking behavior decreased significantly. This confirmed what vets had long suspected: that stress and anxiety play a major role in triggering and maintaining the habit.

Further research referenced in Dr. Dodman's book The Well-Adjusted Dog drew parallels between acral licking in dogs and obsessive-compulsive disorder (OCD) in humans. The repetitive, self-soothing nature of the behavior, the difficulty stopping even when it causes harm, and the genetic predisposition seen in certain breeds all point in the same direction.

So when you see your dog licking that spot, they are not being stubborn or dramatic. They are genuinely stuck in a loop that their brain has decided is rewarding.

Which dogs are most at risk?

Any dog can develop a lick granuloma, but certain larger breeds show a much higher rate of the condition. Research and clinical experience consistently points to the same breeds appearing in veterinary consulting rooms with these sores. The breeds most commonly affected include: Doberman Pinschers Great Danes Labrador Retrievers Golden Retrievers English Springer Spaniels Irish Setters

The genetic component is real. Some breeds appear wired in a way that makes compulsive licking more likely, particularly when they are stressed, bored, or in pain.

What triggers the licking in the first place?

Most cases begin with a physical trigger. The dog feels an itch, an ache, or a skin irritation and starts licking to soothe it. Over time the licking becomes habitual and the original trigger may no longer even be present, but the behavior carries on regardless.

Physical triggers

• Arthritis or joint pain (very common in older dogs)
• Skin allergies, both environmental and food-related
• Bacterial skin infections
• Fungal infections including ringworm
• Parasites such as fleas or mites that cause generalized itching

Behavioral and emotional triggers

Research by Dr. Ian B. Spiegel, VMD, DACVD, published in dvm360 found that more than half of dogs with acral lick dermatitis are suspected to have a concurrent fear or anxiety-based condition. This includes separation anxiety, noise phobia, and anxiety-related aggression.

This is also why stopping one area of licking without addressing the underlying cause often backfires. Buster, an overweight English Springer Spaniel I treated, is a perfect example. His owner had put sweatbands on his legs to prevent him reaching the sores. By the time I saw him, Buster had sweatbands on all four legs and had just started working on his upper arm. Without addressing his arthritis pain and anxiety, there was always going to be a new target.

How is a lick granuloma treated?

Think of treatment as a two-pronged approach. You need to heal the wound itself and deal with whatever is driving the licking. Doing one without the other rarely produces lasting results.

One of the most frustrating aspects of this condition is that the skin lesions will almost heal, then be fully reactivated by a single licking session. This is why treatment needs to continue for at least four weeks after symptoms have resolved, even when things look much better to the naked eye.

Treating the wound

• Antibiotics or antifungals if there is an active infection
• Anti-inflammatory medications to reduce the skin tingle that keeps drawing attention back to the spot
• Local anesthetic creams to numb the area
• Bandaging or an Elizabethan collar to physically prevent access

A word of caution on the cone of shame: it helps in the short term, but as soon as it comes off, most dogs go straight back to licking. It buys you time but does not fix anything on its own.

Finding and addressing the root cause

• Blood tests, skin biopsies, or X-rays to identify underlying physical conditions
• A hypoallergenic diet trial if food allergy is suspected
• Environmental allergy testing
• Regular parasite prevention to rule out flea and mite-related itching
• Pain management for dogs with arthritis
• Behavioral support or medication for dogs with anxiety

In Buster's case, arthritis medication reduced his licking significantly but did not eliminate it entirely. His habit had become so ingrained that the licking had taken on a reward value of its own. His owner made the practical decision to keep him comfortable with pain relief, manage his weight, and accept a reduced but not zero level of licking. For Buster and his family, that was the right outcome. A note from Dr. Elliott:

Treatment for lick granuloma needs to continue for at least four weeks after symptoms have resolved. Stopping early is one of the most common reasons dogs relapse. If your dog has been prescribed antibiotics for this condition, complete the full course even when things look much better.

When should you see a vet?

If you notice a sore that your dog keeps returning to, do not wait to see if it resolves on its own. Early intervention genuinely makes a difference. The longer the licking habit is established, the more it resembles a compulsion rather than a response to a physical trigger, and the harder it becomes to treat.

A vet visit is especially important if the sore is infected, if your dog seems to be in pain, or if you have already tried restricting access and your dog has simply moved to a different spot.

If your dog also shows signs of anxiety, restlessness, or compulsive behavior in other areas of their life, mention this to your vet. A referral to a veterinary behaviorist may be part of the solution.

Frequently Asked Questions (FAQ)

References

1. Dodman, Nicholas H., DVM. The Well-Adjusted Dog: Dr. Dodman's 7 Steps to Lifelong Health and Happiness for Your Best Friend. Houghton Mifflin Harcourt. 2008. 158–160. https://books.google.com/books?id=5f8aABaBfacC&pg=PA158#v=onepage&q&f=false.
2. Rapoport, Judith L., MD. "Drug Treatment of Canine Acral Lick: An Animal Model of Obsessive-Compulsive Disorder." Archives of General Psychiatry 49, no. 7 (July 1992): 517–521. https://www.ncbi.nlm.nih.gov/pubmed/1385694.
3. Spiegel, Ian B., VMD, DACVD. "Just Ask the Expert: How Do You Combat Acral Lick Dermatitis?" dvm360. Oct. 1, 2010. http://veterinarymedicine.dvm360.com/just-ask-expert-how-do-you-combat-acral-lick-dermatitis.
4. Nelson, Richard W., DVM, and Guillermo Couto, DVM. Small Animal Internal Medicine, 4th Edition. Mosby. 2008.
5. Shumaker, Amy, DVM, DACVD, et al. "Microbiological and Histopathological Features of Canine Acral Lick Dermatitis." Veterinary Dermatology 19, no. 5 (October 2008): 288–298. https://pubmed.ncbi.nlm.nih.gov/18699812/.
6. Goldberger, Erica and Judith L. Rapoport, MD. "Canine Acral Lick Dermatitis: Response to the Antiobsessional Drug Clomipramine." Journal of the American Animal Hospital Association 27, no. 2 (March/April 1991): 179–182.
7. Shumaker, Amy K., DVM, DACVD. "Diagnosis and Treatment of Canine Acral Lick Dermatitis." Veterinary Clinics of North America: Small Animal Practice 49, no. 1 (January 2019): 105–123. https://pubmed.ncbi.nlm.nih.gov/30268424.
8. Rehl, David J., DVM, et al. "Fluoxetine Treatment of Acral Lick Dermatitis in Dogs: A Placebo-Controlled Randomized Double Blind Trial." Journal of the American Animal Hospital Association 34, no. 4 (July/August 1998): 501–508. https://pubmed.ncbi.nlm.nih.gov/9750975.