Skin tags are not caused by HPV. Although a handful of studies have detected HPV DNA inside skin tag tissue, the weight of the evidence points to skin tags being benign growths driven by friction, metabolic factors, and hormonal changes rather than viral infection. Warts, on the other hand, are directly caused by HPV and behave very differently. The confusion between these two common skin growths is understandable since both are small, flesh-colored, and harmless, but they differ in almost every meaningful way, from what triggers them to how they look under a microscope to how they should be treated.
The HPV Question and Why It Persists
The idea that HPV might play a role in skin tags gained traction after a study published in the Indian Journal of Dermatology, Venereology and Leprology found HPV DNA in about 49% of skin tag samples. All the positive samples contained HPV types 6 and 11, which are low-risk strains associated with genital warts rather than cancer. Importantly, the normal skin surrounding those same skin tags tested negative for HPV, which the authors took as evidence that the virus was present specifically within the tag tissue rather than just sitting on the skin surface.1PubMed. Human papillomavirus and skin tags: Is there any association?
That finding, however, has not held up well. A later study that specifically set out to test the HPV-skin tag connection using both low-risk and high-risk HPV probes found essentially no relationship. All of the skin tag samples came back negative for HPV. The only HPV-positive samples turned up in the control group, not in the skin tags themselves. The researchers concluded there was no significant relationship between HPV and skin tags.2PubMed Central. An Association of Human Papillomaviruses Low Risk and High Risk Subtypes with Skin Tag
So what happened with the earlier positive result? One possibility is that HPV DNA was incidentally present in the tissue without actually driving growth. HPV is extraordinarily common in the general population, and trace amounts of viral DNA can linger in epithelial cells without producing any disease. Finding HPV in a skin tag does not mean the virus caused the tag any more than finding a stray bacteria on a mole means bacteria caused the mole. The current medical consensus treats skin tags as non-viral growths, and no dermatology guideline lists HPV as a cause.
What Actually Causes Skin Tags
Skin tags tend to cluster in areas where skin rubs against skin or clothing: the neck, armpits, under the breasts, groin folds, and eyelids. This distribution pattern is one of the strongest clues to their origin. A case report in the Dermatology Online Journal described a patient who developed multiple skin tags arranged in a linear pattern directly corresponding to a friction source, suggesting that mechanical irritation plays a direct role in triggering their formation.3PubMed. Friction induced skin tags
Research into the biological mechanism points to mast cells as key players. When skin is repeatedly rubbed or irritated, mast cells accumulate in the dermis and release signaling molecules, including TNF-α. These signals can stimulate fibroblasts and keratinocytes to proliferate, gradually building up the small stalk of tissue that becomes a skin tag. The process is essentially an overgrowth response to chronic low-grade trauma, not an infection.4PubMed Central. The Possible Role of Trauma in Skin Tags Through the Release of Mast Cell Mediators
Friction alone does not explain all skin tags, though. Insulin resistance is another major contributor. When cells become less responsive to insulin, the pancreas compensates by producing more of it. This excess insulin, along with elevated levels of insulin-like growth factor (IGF-1), directly stimulates the growth of epithelial cells and fibroblasts. That mechanism likely explains why skin tags are significantly more common in people with type 2 diabetes, obesity, and metabolic syndrome.5Anais Brasileiros de Dermatologia. Association between skin tags and insulin resistance
Pregnancy represents another well-recognized trigger. The hormonal shifts of pregnancy, combined with weight changes and increased skin-on-skin contact, create ideal conditions for skin tag development. A comprehensive review of pregnancy-related skin changes lists skin tags (acrochordons) among the recognized cutaneous changes driven by hormonal, mechanical, and immunological factors during pregnancy.6PubMed Central. Cutaneous Changes During Pregnancy: A Comprehensive Review Many of these pregnancy-related skin tags shrink or fall off after delivery, which further supports a hormonal rather than viral explanation.
How Skin Tags and Warts Actually Look Different
If you are staring at a bump on your skin and trying to figure out which one you have, the differences are usually visible without magnification once you know what to look for.
Skin tags are soft, smooth, and hang off the skin on a thin stalk (sometimes called a peduncle). They tend to match your skin color or run slightly darker. They are usually small, ranging from a couple of millimeters to about half a centimeter, though occasional ones grow larger. They do not have a rough or textured surface, and they move freely when you touch them because they are attached by such a narrow base.
Warts, by contrast, are firm and tend to be flat-topped or dome-shaped with a rough, irregular surface. Common warts (verruca vulgaris) often have tiny dark dots visible inside them, which are clotted blood vessels. Warts feel firmly rooted in the skin rather than dangling from it. Plantar warts on the feet can be pressed inward by walking, making them flush with or even indented below the skin surface. Flat warts, which favor the face and hands, are smoother but still have a slightly grainy texture that skin tags lack.
The location can also help. Skin tags rarely appear on the hands or feet, which are prime wart territory. Warts can show up almost anywhere but are especially common on the fingers, around nails, and on the soles of the feet. When warts do appear in skin-fold areas like the groin, they are usually genital warts caused by HPV types 6 and 11, and they tend to grow in clusters with a cauliflower-like appearance that looks nothing like the isolated, dangling profile of a skin tag.
Under the Microscope
When a dermatologist or pathologist examines these growths under a microscope, the differences are stark. A histopathological study comparing verrucous lesions and their mimics showed that skin tags (fibroepithelial polyps) have an undulating, thin epidermal surface with mild hyperkeratosis. The tissue is mostly made up of loose connective tissue covered by a thin layer of normal-looking skin. Warts, in contrast, display a thickened, acanthotic epidermis with prominent fibrovascular cores. They also contain distinctive keratohyaline granules visible at higher magnification, a hallmark of viral infection that skin tags completely lack.7PubMed Central. Histopathological Study of Verrucous Lesions and its Mimics
Research on growth-factor receptors adds another layer of distinction. A study examining epidermal growth factor receptors (EGF-R) in various skin conditions found that actively growing skin tags showed elevated EGF-R activity, while common warts (verruca vulgaris) showed no detectable EGF-R at all. This means the two growths are using completely different biological machinery to sustain themselves. Skin tags grow through normal growth-factor signaling that has been turned up too high, while warts are driven by viral hijacking of the cell’s replication apparatus.8PubMed Central. Epidermal growth factor receptors in idiopathic and virally induced skin diseases
Why the Distinction Matters for Treatment
Because skin tags and warts have completely different causes, the way you approach getting rid of them differs in important ways.
Skin tags do not require treatment medically. They are benign and will never become cancerous. Most people remove them for cosmetic reasons or because a tag in a friction-prone spot keeps getting caught on clothing or jewelry. The standard removal methods are straightforward: snip excision with small scissors, cryotherapy (freezing), or electrocautery (burning). A recent randomized trial comparing scissor excision to laser treatment for skin tags found that scissors achieved an 85% healing rate at 12 weeks compared to 71% for laser, suggesting that the simplest approach remains the most effective.9PubMed. Removal of skin tags: scissor excision versus non-ablative 532nm-LBO-laser in a randomized intraindividual controlled observer-blinded clinical trial Newer techniques like excision with a small ring curette under topical anesthesia offer another minimally invasive option for people with many small tags, particularly on the neck.10PubMed. Three Cases of Skin Tags on the Neck Treated With a Novel and Minimally Invasive Approach Using a 2-mm Ring Curette
Wart treatment is a different animal. Because warts are caused by an active viral infection, the goal is not just removing the visible growth but clearing the virus from the affected skin. Warts can recur after removal if viral particles remain. Over-the-counter salicylic acid preparations are a common first-line approach, slowly dissolving the thickened skin layer by layer. Cryotherapy with liquid nitrogen is widely used in clinical settings. More stubborn warts may be treated with prescription topicals like imiquimod, which stimulates the immune system to attack the virus, or with intralesional injections. Warts can also resolve on their own as the immune system eventually mounts a response, something that is not relevant to skin tags since no pathogen needs clearing.
This is also where the HPV question has practical consequences. If skin tags were truly caused by HPV, they would be contagious and potentially recurrent in the way warts are. They are not. You cannot “catch” skin tags from another person, and removing a skin tag does not carry any risk of spreading a virus to surrounding tissue. Warts, conversely, can spread to other parts of your own body through autoinoculation (touching the wart and then touching another area) and can spread between people through direct or indirect contact.
Tricky Cases and When to See a Doctor
Most of the time, telling skin tags from warts is simple enough. But a few situations can genuinely blur the line. Filiform warts, for instance, are a type of wart that grows on a narrow stalk, similar in shape to a skin tag. They favor the face, especially around the eyes and lips, and can fool people into thinking they are dealing with a skin tag in an unusual spot. The key difference is texture: filiform warts tend to have finger-like projections and a slightly rough surface, while skin tags are uniformly smooth.
Genital skin tags can also create confusion. Small pedunculated growths in the groin or around the genitals might be harmless skin tags, or they might be condylomata (genital warts). Given that genital warts carry health implications including the potential for transmission to partners, any new or unfamiliar growth in the genital area is worth having a clinician examine. This is one scenario where the HPV question becomes directly relevant to a real diagnostic decision.
Eyelid skin tags present their own challenges. They are quite common and usually harmless, but removal near the eye requires extra care. Current treatment options including electrosurgery, snip excision, and cryotherapy can all be used, but the delicate location makes the procedure more technically demanding than removing a tag from the neck or armpit.11Journal of Cutaneous and Aesthetic Surgery. Surgical pearl: A simple technique to prevent involuntary eyelid movement during skin tag removal
Any growth that changes rapidly in size, bleeds without being irritated, changes color unevenly, or looks different from your other skin tags deserves a professional evaluation. Skin tags that do not behave like typical skin tags could occasionally be something else entirely, including uncommon lesions that mimic their appearance.
Skin Tags as a Metabolic Signal
One of the more underappreciated aspects of skin tags is their potential role as an early warning sign. Because insulin resistance is a strong driver of skin tag formation, the sudden appearance of multiple skin tags, especially in someone who is overweight or has a family history of diabetes, can be a visible clue that metabolic health is shifting. Some dermatologists consider widespread skin tags, particularly when accompanied by darkened, velvety skin in the same folds (a condition called acanthosis nigricans), as a reason to screen for diabetes or prediabetes. The same insulin-driven growth pathway that promotes skin tag formation also promotes acanthosis nigricans, so the two often appear together.5Anais Brasileiros de Dermatologia. Association between skin tags and insulin resistance
Warts carry no such metabolic signal. They are purely an infectious phenomenon that can affect anyone regardless of metabolic health. If anything, warts are more common in children and young adults, who tend to have the lowest rates of insulin resistance, and in immunocompromised individuals whose weakened defenses let HPV gain a foothold more easily.
The Psychological Side of Warts
While skin tags are mostly a cosmetic nuisance, warts, particularly genital warts, carry a psychological burden that goes well beyond the physical growth itself. A study comparing the mental health of patients with anogenital warts to a control group found that wart patients had significantly worse mental health overall, along with measurably higher anxiety and depression scores. Their general health status and social functioning were also diminished compared to the control group.12PubMed Central. Evaluation of Psychopathology and Quality of Life in Patients with Anogenital Wart Compared to Control Group
The stigma attached to HPV, the worry about transmitting the virus to a partner, and the frustrating tendency of warts to recur after treatment all contribute to this psychological toll. Skin tags simply do not carry this kind of emotional weight. Nobody worries about giving their partner a skin tag, and nobody feels stigmatized by having one. The distinction matters because conflating the two growths, or believing skin tags are caused by HPV, can generate unnecessary anxiety. If you have been told or have read online that your skin tags are a sign of an HPV infection, the evidence does not support that claim. The overwhelming likelihood is that your skin tags are just skin tags, driven by the same friction, hormones, and metabolic factors that produce them in millions of other people.
Home Remedies and What to Avoid
The internet is full of suggestions for removing both skin tags and warts at home, and some of them range from ineffective to genuinely harmful. Tying off a skin tag with dental floss or string is a widely shared home remedy. The idea is to cut off the blood supply so the tag dies and falls off. It sometimes works for very small tags, but it carries a real risk of infection, especially if the area is not kept clean. Over-the-counter wart removal products containing salicylic acid are safe for warts on the hands and feet but should never be used on skin tags, particularly in sensitive areas like the eyelids, neck, or genitals. These products are designed to dissolve thickened, virus-infected epidermis, not the thin, normal skin that makes up a skin tag.
Freezing products sold for home use are another popular option. While these can work on small common warts, they reach much lower temperatures than the liquid nitrogen used in a clinic and may not be effective for larger growths. Using them on skin tags in delicate areas risks damaging surrounding healthy skin. For skin tags that bother you enough to remove, a quick visit to a dermatologist for snip excision is typically fast, inexpensive, and heals without complications. For warts, persistence matters more than the specific method: many treatments require repeated applications over weeks, and patience with the process is more important than finding the “right” product.
Perhaps the most important thing to avoid is assuming that any small skin bump is automatically harmless. Most are. But a habit of getting new or unusual growths checked, especially growths in the genital area or growths that do not match the typical profile of a skin tag or common wart, is a reasonable practice that occasionally catches something more significant early.