Skin Tags & Warts on Dogs: When to Worry

Quick Answer
  • Most dog skin tags are benign fibrous skin growths, while true dog warts are usually papillomas caused by canine papillomavirus.
  • Many papillomas in young dogs shrink within 1-2 months, but skin tags and sebaceous growths usually stay unless removed.
  • See your vet promptly for any lump that grows quickly, changes color, bleeds without trauma, feels firm, or bothers your dog.
  • Your vet may recommend monitoring, a fine-needle aspirate, or removal depending on the growth's appearance, location, and how much it affects your dog.
Estimated cost: $0–$1,200

What Are Skin Tags & Warts?

Skin tags and warts are common skin growths in dogs, but they are not the same thing. Skin tags are benign overgrowths of skin and connective tissue. They are often soft, flesh-colored, and attached by a narrow stalk. They tend to show up in middle-aged or older dogs, especially in areas with friction like the chest, armpits, elbows, neck, or groin.

Warts, also called papillomas, are usually caused by canine papillomavirus. They often look rough, bumpy, or cauliflower-like. Papillomas are more common in puppies, young dogs, and dogs with weaker immune defenses. They often appear around the lips, mouth, eyelids, feet, or face, and they may occur as one growth or several at once.

There is also a third category that pet parents often call a wart: sebaceous gland growths such as sebaceous adenomas or sebaceous hyperplasia. These are common in older dogs and may look waxy, lobulated, or slightly crusty. They are often benign, but they can resemble other skin masses.

That is why appearance alone is not enough. Some concerning tumors, including mast cell tumors, can mimic harmless bumps. Any new lump deserves a hands-on exam by your vet, and many are best confirmed with a needle sample or biopsy.

Signs of Skin Tags & Warts in Dogs

  • Soft, flesh-colored growth hanging from the skin on a thin stalk, often mild concern unless irritated
  • Rough, cauliflower-like bump on the lips, mouth, eyelids, or feet, especially in young dogs
  • Waxy, raised, hairless, or lobulated bump in an older dog that stays stable over time
  • Single bump or multiple clustered growths, with clusters more common in viral papillomas
  • Bleeding after rubbing, scratching, grooming, or collar friction, which raises concern for trauma or ulceration
  • Licking, chewing, pawing, or rubbing at the growth, suggesting irritation or pain
  • Bad breath, drooling, trouble chewing, or dropping food if oral papillomas are present
  • Rapid growth, color change, ulceration, firmness, or attachment to deeper tissue, which needs prompt veterinary evaluation

Many benign skin growths do not hurt and are found by accident during petting, bathing, or grooming. The main question is not whether a bump looks harmless, but whether it is truly harmless. A soft, dangling tag is often less urgent than a firm, fast-changing lump, but both still deserve documentation and a veterinary exam. See your vet sooner if the growth is new, enlarging, bleeding without obvious trauma, interfering with eating or walking, or if your dog seems bothered by it.

What Causes Skin Tags & Warts?

Skin tags are not caused by a virus. They are thought to develop from localized overgrowth of normal skin and connective tissue. Friction may contribute in some dogs, especially where skin rubs against skin, collars, harnesses, or bedding. They are seen more often in older dogs, and some dogs seem genetically more prone to developing multiple tags over time.

Viral papillomas are caused by canine papillomavirus. The virus spreads between dogs through direct contact or contaminated items like bowls, toys, or shared surfaces. It usually enters through tiny breaks in the skin or mouth lining. Young dogs are affected most often because they have not built immunity yet. In many healthy dogs, the immune system eventually recognizes the virus and the papillomas regress.

Sebaceous growths are age-related benign proliferations of oil gland tissue. These are especially common in senior dogs and can be mistaken for warts. Small-breed and older dogs appear overrepresented in sebaceous adenomas, though any breed can develop them.

Breed patterns are not absolute, but skin tags and benign skin growths are often reported more often in older dogs, large dogs, and breeds with skin folds or friction-prone areas. Papillomas are more about age and immune status than breed alone.

How Are Skin Tags & Warts Diagnosed?

Diagnosis starts with a physical exam, but visual inspection has limits. Your vet will look at the growth's size, texture, attachment, location, and whether there are signs of inflammation, infection, or ulceration. A classic skin tag may be easy to suspect, and a papilloma may have a recognizable rough surface, but many masses overlap in appearance.

A fine-needle aspirate (FNA) is often the next step for a new or changing lump. This uses a small needle to collect cells for cytology. It is quick, often done during the visit, and may help rule in or rule out more concerning masses. Not every wart-like lesion yields a perfect sample, so sometimes your vet may recommend a biopsy or removal with histopathology for a definite answer.

This matters because some malignant tumors can look deceptively ordinary. Mast cell tumors are especially known for acting like "great pretenders" on the skin. A bump that seems harmless to a pet parent can still need testing.

In general, see your vet promptly if a lump is new, growing, ulcerated, painful, fixed in place, or changing in color or texture. Photos and a simple home "lump map" can help you track what is stable and what is new between visits.

Treatment Options for Skin Tags & Warts

Spectrum of Care means you have options. Here are treatment tiers at different price points.

Monitor confirmed benign growths

$65–$250
Best for: Dogs with small, confirmed benign growths that are not painful, not bleeding, and not interfering with eating, walking, grooming, or collar use.
  • Office exam and skin-mass assessment
  • Fine-needle aspirate when the growth is suitable for sampling
  • Home monitoring with photos and size tracking
  • E-collar or anti-licking plan if the area is mildly irritated
  • Watchful waiting for young dogs with uncomplicated papillomas that may regress in 1-2 months
Expected outcome: Excellent for comfort and safety when the mass has been appropriately evaluated. Papillomas may regress. Skin tags and sebaceous growths often remain stable or slowly enlarge over time.
Consider: The bump usually stays in place unless it is a papilloma that regresses. Monitoring only works if the diagnosis is reasonably secure and the growth is not changing.
Most Common

Single-growth removal with pathology

$250–$700
Best for: A growth that catches on collars or brushes, bleeds repeatedly, gets infected, worries the pet parent, or cannot be confidently identified without removal.
  • Pre-procedure exam and estimate
  • Local anesthesia, sedation, or short general anesthesia depending on location and temperament
  • Simple surgical excision, electrocautery, or selected cryotherapy for appropriate superficial lesions
  • Pain control and home-care instructions
  • Submission for histopathology when removed
Expected outcome: Excellent for most benign skin tags, sebaceous adenomas, and isolated papillomas. Removal is usually curative for that individual lesion.
Consider: Requires a procedure and recovery care. Histopathology adds cost but gives the most confidence about what was removed. New benign growths can still appear elsewhere later.

Multiple or difficult-location removals

$700–$1,200
Best for: Dogs with many growths, oral or eyelid lesions, lesions affecting function, or cases where diagnosis remains uncertain after initial testing.
  • Pre-anesthetic testing and full surgical planning
  • General anesthesia for multiple masses or sensitive sites such as eyelids, feet, mouth, or between toes
  • Removal of several growths during one anesthetic event
  • Histopathology on selected or all removed masses
  • Referral to dermatology or surgery for atypical, recurrent, or extensive lesions
Expected outcome: Good to excellent in many cases, depending on final diagnosis and location. Functional comfort often improves when irritated or obstructive lesions are removed.
Consider: Higher cost range, anesthesia exposure, and more aftercare. Some dogs prone to benign growths will continue to develop new lesions over time, even after successful removal.

Cost estimates as of 2026-03. Actual costs vary by location, clinic, and individual case.

Questions to Ask Your Vet About Skin Tags & Warts

Bring these questions to your vet appointment to get the most out of your visit.

  1. Does this look most like a skin tag, papilloma, sebaceous adenoma, or another kind of skin mass?
  2. Is a fine-needle aspirate likely to be useful for this bump, or would biopsy/removal give a better answer?
  3. What changes would make this growth more concerning between now and our next visit?
  4. Is this location likely to keep getting irritated by a collar, harness, grooming, chewing, or walking?
  5. If we monitor it, how often should I measure or photograph it?
  6. If we remove it, what type of anesthesia or sedation would my dog likely need?
  7. Do you recommend sending the tissue for histopathology after removal?
  8. If my dog has several bumps, which ones should we test first and which can we safely watch?

Managing Skin Growths on Your Dog

You usually cannot prevent every skin tag or wart, but you can catch problems earlier. During brushing, bathing, or cuddle time, run your hands over your dog's body and note any new bumps. Take a photo next to a coin or ruler and write down the date, body location, and approximate size. This gives your vet a much clearer history.

Try to reduce repeated friction when possible. Make sure collars and harnesses fit well, keep skin folds clean and dry if your dog has them, and let your groomer know about any known tags so they are not accidentally nicked. If a benign growth is in a high-rub area, your vet can help you decide whether monitoring or removal makes more sense.

If your dog has viral papillomas, avoid sharing bowls, toys, and close contact with other dogs until the lesions are gone, especially around puppies or dogs with weaker immune systems. Canine papillomavirus is considered species-specific, so it does not spread to people.

Do not cut, tie off, burn, or treat a growth at home with vinegar, essential oils, or over-the-counter wart products. Home removal can cause pain, bleeding, infection, and delayed diagnosis. The safest next step for any new or changing lump is an exam with your vet.

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