Can Dogs Get Skin Tags? The Science Behind Canine Acrochordons
Can dogs get skin tags? Yes. Learn the veterinary science behind canine acrochordons, what causes them, when they signal a problem, and how to manage them safely.
If you've noticed a small, soft, flesh-colored bump dangling from your dog's skin — perhaps on their chest, armpit, eyelid, or along a skin fold — you're not alone in wondering what it is. Skin tags in dogs are surprisingly common, and understanding the biology behind them can help you distinguish harmless growths from something requiring veterinary attention.
What Exactly Are Canine Skin Tags?
Skin tags in dogs are classified as fibroepithelial polyps or acrochordons. They consist of a core of fibrous connective tissue and small blood vessels, covered by normal epidermis (the outer skin layer). Most range from 2mm to 10mm in diameter, though some can grow larger, particularly in breeds with extensive skin folds.
The Physiological Mechanism
Skin tags form when localized areas of the dermis undergo fibroblast proliferation — essentially, the cells responsible for producing collagen and connective tissue begin multiplying in a concentrated area. This overgrowth pushes outward through the epidermis, creating a stalk-like base (the peduncle) topped with a fleshy bulb.
Several factors drive this proliferation:
- Chronic friction: Repeated skin-on-skin or skin-on-collar rubbing stimulates fibroblast activity as a repair response
- Insulin-like growth factor (IGF-1): Elevated IGF-1 levels in older dogs promote fibroblast division — the same mechanism linked to skin tags in humans with insulin resistance
- Collagen remodeling: Age-related changes in collagen cross-linking create structural weak points where tags can emerge
- Localized inflammation: Chronic low-grade dermatitis in skin folds triggers repair cascades that occasionally overshoot into polyp formation
According to the Merck Veterinary Manual, the canine skin is a dynamic organ with constant cellular turnover, making it susceptible to various benign growths as dogs age. Fibrovascular papillomas represent one of the most common benign cutaneous neoplasms in dogs, alongside lipomas and sebaceous adenomas.
The Evolutionary Context: Why Skin Tags Exist
From Wolf to Companion: A Byproduct of Domestication
Wild wolves and ancestral canids rarely develop skin tags. The reason is twofold:
- Natural selection pressure: In wild populations, any skin growth that could catch on brush, impair movement, or become infected would reduce survival. Wolves with genetic predispositions to fibroblast overgrowth would be selected against over generations.
- Shorter lifespans: Wild canids typically live 6-8 years. Skin tags are predominantly age-related, appearing after the reproductive window. In the wild, wolves rarely survive long enough for these growths to manifest.
Domestication changed both dynamics. Selective breeding for traits like loose skin (Bloodhounds, Basset Hounds, Shar-Peis) and wrinkled faces (Bulldogs, Pugs) inadvertently created environments where chronic friction is constant. Combined with modern veterinary care extending canine lifespans to 12-15+ years, domestic dogs now live long enough for age-related fibroblast proliferation to become visible.
Additionally, the neural crest cell hypothesis of domestication — proposed by researchers at Harvard and documented in Genetics journal — suggests that selecting for tameness altered neural crest development, affecting connective tissue formation throughout the body. This may partly explain why domestic dogs develop more benign connective tissue growths (skin tags, lipomas) than their wild counterparts.
Breed Variations: Which Dogs Are Most Prone?
While any dog can develop skin tags, certain breeds and body types show higher prevalence due to anatomical and genetic factors:
| Breed Category | Example Breeds | Why Prone | Common Locations |
|---|---|---|---|
| Brachycephalic breeds | English Bulldog, Pug, French Bulldog | Deep facial wrinkles create chronic friction and moisture retention | Face folds, neck, lip folds |
| Loose-skinned hounds | Basset Hound, Bloodhound, Coonhound | Excessive skin folds rub during movement | Neck, chest, leg folds, dewlap area |
| Large/giant breeds | Great Dane, Mastiff, Saint Bernard | Greater skin surface area; heavier skin folds | Flanks, pressure points, chest |
| Spaniels and retrievers | Cocker Spaniel, Golden Retriever | Genetic predisposition to benign skin growths; lipoma and tag co-occurrence | Trunk, armpits, groin |
| Wire-haired/terrier breeds | Miniature Schnauzer, Wire Fox Terrier | Follicular structure predisposes to various cutaneous growths | Back, legs, eyelid margins |
Cocker Spaniels and Miniature Schnauzers deserve special mention. These breeds show a documented predisposition not only to skin tags but to a broader category of benign skin growths. Schnauzers, in particular, frequently develop multiple small papillomas along their topline, which owners sometimes mistake for skin tags but are technically canine viral papillomas (caused by canine papillomavirus) or infundibular keratinizing acanthomas. Your veterinarian can distinguish these through fine-needle aspiration or biopsy.
Skin Tags vs. Dangerous Growths: What Owners Must Know
This is the most critical section for practical decision-making. Not every dangling growth on your dog is a harmless skin tag. Several malignant tumors can mimic acrochordons in early stages.
| Feature | Benign Skin Tag | Concerning Growth (See Vet) |
|---|---|---|
| Color | Flesh-colored or slightly pink; matches surrounding skin | Dark, black, purple, or mottled; different from surrounding skin |
| Growth rate | Slow-growing; may remain same size for months or years | Rapid growth over days to weeks |
| Texture | Soft, pliable, moves easily on stalk | Firm, hard, fixed to underlying tissue |
| Surface | Smooth, intact skin covering | Ulcerated, bleeding, crusted, or oozing |
| Shape | Clearly pedunculated (narrow stalk with bulbous top) | Broad-based, irregular borders, or cauliflower-like |
| Behavior | Dog doesn't bother it; no scratching or licking | Dog obsessively licks, scratches, or bites at it |
| Number | Usually solitary or few, stable over time | Multiple new growths appearing rapidly |
Contact your veterinarian promptly if any skin growth:
- Appears suddenly and grows noticeably within 1-2 weeks
- Bleeds spontaneously or doesn't stop bleeding after minor trauma
- Is black or darkly pigmented (could indicate melanoma)
- Has an irregular surface or "cauliflower" texture (could indicate squamous cell carcinoma or mast cell tumor)
- Is located in the mouth, on the genitals, or near the nail beds
- Causes your dog to limp, scratch excessively, or show behavioral changes
Mast cell tumors — one of the most common canine skin cancers — can sometimes present as raised, fleshy bumps that owners mistake for skin tags. According to the American Kennel Club, mast cell tumors affect approximately 7-21% of all canine skin tumors, making professional evaluation of any new growth essential.
Common Misconceptions About Dog Skin Tags
| Myth | Fact |
|---|---|
| "Skin tags mean my dog has cancer" | Skin tags (acrochordons) are benign by definition. However, some malignant tumors can look like skin tags in early stages, which is why veterinary evaluation matters. |
| "I should tie a string around it to make it fall off" | Never do this. Ligating a growth can cause necrosis, infection, and severe pain. If the growth is actually a mast cell tumor, trauma can trigger massive histamine release causing anaphylaxis. |
| "Skin tags are caused by poor hygiene" | Skin tags are not caused by dirt or lack of bathing. They result from fibroblast proliferation driven by friction, genetics, and age. Clean dogs get them too. |
| "If I remove one, more will grow back" | Removing a skin tag doesn't cause more to grow. However, the same factors that caused the first (age, friction, breed predisposition) may independently produce additional tags over time. |
| "Skin tags are contagious" | Acrochordons are not infectious. They cannot spread to other dogs or humans. Note: canine viral papillomas (which can look similar) are contagious between dogs — another reason to get a proper diagnosis. |
| "Only old dogs get skin tags" | While prevalence increases significantly after age 7, skin tags can appear in dogs as young as 3-4 years, especially in predisposed breeds with extensive skin folds. |
How Skin Tags Differ Between Dogs and Humans
Both humans and dogs develop acrochordons through similar fibroblast proliferation mechanisms, but several key differences exist:
- Insulin connection: In humans, skin tags are strongly correlated with insulin resistance, metabolic syndrome, and type 2 diabetes. A 2010 study in the Journal of the American Academy of Dermatology found that 67% of human patients with multiple skin tags had insulin resistance. In dogs, this metabolic link is less well-established. While obese dogs do develop more skin growths, veterinary dermatologists have not confirmed the same direct IGF-1/insulin pathway as the primary driver.
- Location patterns: Human skin tags cluster at the neck, armpits, groin, and eyelids. Dogs develop them in these areas too, but also commonly along the trunk, at collar-contact points, and within breed-specific skin folds — locations driven more by anatomy than metabolic factors.
- HPV involvement: Some human skin tags are associated with human papillomavirus (HPV) infection. In dogs, canine papillomavirus (COPV) causes viral papillomas that may resemble skin tags but are a distinct clinical entity. COPV papillomas typically appear in the mouth and on the lips of young dogs, while true acrochordons appear on haired skin of older dogs.
- Spontaneous regression: Human skin tags rarely resolve without removal. Canine viral papillomas (the look-alikes) often regress spontaneously within 2-3 months as the immune system clears the virus — another reason accurate diagnosis matters.
Practical Management: What This Means for Daily Life
Your Action Plan for Canine Skin Tags
- Initial discovery: When you first notice a skin tag, photograph it next to a ruler or coin for scale. Note the date, location, and approximate size. This baseline helps track changes.
- Veterinary evaluation: Schedule a non-emergency appointment within 2-4 weeks for any new skin growth. Your vet will perform a physical exam and may do a fine-needle aspiration (FNA) — a quick, minimally invasive procedure costing approximately $50-$150 depending on your region. FNA allows cytological examination to confirm the growth is benign.
- Monitoring routine: Check your dog's skin tags monthly during grooming or petting sessions. Measure any that seem to be growing. A growth rate exceeding 1-2mm per month warrants re-evaluation.
- Friction reduction: If tags form at collar contact points, switch to a well-fitted harness (brands like Ruffwear Front Range or Kurgo Tru-Fit, $25-$45) to eliminate neck friction. For skin-fold tags, daily cleaning of folds with veterinary-recommended wipes (e.g., Chlorhexidine-based wipes, $8-$15 per pack) reduces chronic inflammation.
- Do NOT attempt home removal: Cutting, tying, freezing (OTC cryotherapy kits), or applying home remedies to skin tags on your dog can cause infection, hemorrhage, and unnecessary pain. If a tag is large enough to interfere with movement or gets caught on objects, your vet can remove it surgically under local or general anesthesia. Typical veterinary removal costs range from $200-$500 per tag, including anesthesia, surgical excision, and histopathology.
When Removal Is Recommended
Most skin tags require no treatment. Your veterinarian may recommend removal in these situations:
- The tag is located on the eyelid margin and rubbing against the cornea (risk of corneal ulceration)
- The tag is in the mouth or on the lip and interferes with eating
- The tag is large enough (>1cm) that it repeatedly catches on furniture, brush, or grooming tools
- The tag has changed in appearance (color, size, texture) and your vet wants a biopsy for definitive diagnosis
- The tag is causing secondary skin infection due to moisture trapped beneath it
Removal procedures typically involve one of three methods: surgical excision (scalpel removal with sutures, most common), cryosurgery (liquid nitrogen freezing, suitable for small tags), or electrosurgery (cautery, which seals blood vessels during removal). Your vet will choose based on the tag's size, location, and your dog's temperament for the procedure.
Frequently Asked Questions
Why do dogs get skin tags?
Dogs develop skin tags primarily due to age-related fibroblast proliferation, chronic skin friction, and genetic predisposition. Breeds with loose skin or extensive wrinkles experience more friction-driven tag formation. Hormonal changes in middle-aged and senior dogs, particularly involving growth factors like IGF-1, also stimulate connective tissue overgrowth in localized areas.
Can dogs get skin tags on their eyelids?
Yes. Eyelid skin tags (sometimes called eyelid margin papillomas) are relatively common in older dogs, particularly Cocker Spaniels, Poodles, and small terrier breeds. Eyelid tags require veterinary attention even when benign because they can rub against the cornea, causing irritation, excessive tearing, or corneal ulcers. Surgical removal under general anesthesia is typically recommended for eyelid tags, with costs ranging from $300-$800 including ophthalmologic evaluation.
Is it normal for my dog to have multiple skin tags?
Yes, having multiple skin tags is within normal range, especially in predisposed breeds and dogs over 8 years old. Some dogs develop 5-10 or more tags across their body. However, a sudden eruption of many new skin growths within weeks should prompt a veterinary visit, as this pattern can occasionally signal underlying endocrine disease (hypothyroidism or Cushing's disease) or, rarely, a paraneoplastic syndrome associated with internal tumors.
How do I know if my dog's skin tag is a tick?
This is one of the most common points of confusion. Ticks are attached at skin level with their mouthparts embedded — they don't have a stalk. Skin tags have a distinct narrow peduncle (stalk) connecting them to the skin. Ticks have visible legs when examined closely and are typically gray, brown, or engorged with blood (appearing as a smooth, grayish bean). If you're uncertain, do not pull on the growth. Apply a small amount of rubbing alcohol to the area; ticks will often react to the alcohol while skin tags will not. When in doubt, have your vet examine it.
What does it mean when my dog's skin tag changes color?
Color change in a previously stable skin tag warrants prompt veterinary evaluation. A tag turning dark, black, or purple could indicate compromised blood supply (the stalk twisting and cutting off circulation), hemorrhage within the tag, or transformation into a more serious lesion. While most color changes turn out to be benign vascular events, a biopsy is the only way to rule out malignancy. Expect your vet to recommend excisional biopsy with histopathology ($150-$300 for the lab analysis).
How is this different from humans getting skin tags?
The core mechanism — fibroblast overgrowth — is the same. However, human skin tags are strongly linked to metabolic syndrome and insulin resistance, while in dogs the connection to metabolic disease is weaker and friction/genetics play a larger role. Dogs also develop skin tags in locations unique to their anatomy (within dewlaps, at collar-contact points, inside breed-specific wrinkles) that don't have human equivalents. Additionally, canine viral papillomas can mimic skin tags in dogs, whereas HPV-related skin growths in humans tend to look distinctly different from acrochordons.
This article is for informational purposes only and does not replace professional veterinary advice. Always consult your veterinarian for diagnosis and treatment of any skin growth on your dog. If you suspect your dog has ingested a toxic substance, contact the ASPCA Animal Poison Control Center at (888) 426-4435 (24/7, consultation fee applies).
Beth Carrasco
All our authors care for dogs every day — read more of their work on the authors page.
