Warts are small, rough growths on the skin caused by human papillomavirus (HPV), and their appearance varies widely depending on the type and location. A common wart on the hand typically looks like a firm, raised bump with a rough, grainy surface, while a flat wart on the face can be so smooth and subtle you barely notice it. Because HPV infects the skin in different ways at different body sites, warts can show up as anything from a single hard dome on a finger to a cluster of fleshy, cauliflower-like projections in the genital area. Understanding the visual differences between types helps you figure out what you are dealing with and when to see a doctor.
Common Warts
Common warts, known clinically as verruca vulgaris, are the type most people picture when they hear the word “wart.” They appear most often on the fingers, the backs of the hands, and around the nails, though they can show up almost anywhere. A typical common wart is a raised, dome-shaped bump ranging from a few millimeters to over a centimeter across. The surface has a rough, grainy texture sometimes compared to the head of a cauliflower. The color is usually skin-toned, grayish, or slightly yellowish, and the bump feels firm to the touch.
One of the most recognizable features of common warts is the presence of tiny dark specks scattered across the surface. These are often called “wart seeds,” but they are not seeds at all. They are small blood vessels (capillaries) that have become clotted and visible through the thickened skin. Not every common wart shows these dots clearly, but when they do appear, they are a strong visual clue that the bump is a wart rather than a callus or another skin growth.
Plantar Warts
Plantar warts grow on the soles of the feet, and their appearance is shaped almost entirely by that location. Because you stand and walk on them, plantar warts tend to get pushed inward rather than growing outward like a common wart on the hand. The result is a flat or slightly indented area of thick, hardened skin with a well-defined border. The surface often looks like a rough patch of callus, and the wart may have a central clearing or a cluster of dark dots where those same clotted capillaries show through.
Plantar warts can be painful to walk on, which is often the first reason people notice them. They sometimes grow in clusters called mosaic warts, where several individual warts merge into one larger patch. In children, plantar warts can be particularly bothersome because the location interferes with daily activities, causing pain and embarrassment.1PubMed Central. Paediatric Cutaneous Warts and Verrucae: An Update A useful way to tell a plantar wart apart from a simple callus is to squeeze it from the sides: warts tend to hurt more with lateral pressure, while calluses hurt more with direct downward pressure.
Flat Warts
Flat warts look quite different from the rough, bumpy common wart. They are small, smooth, and only slightly elevated above the surrounding skin. Each individual flat wart is usually just a couple of millimeters across and barely rises above the skin’s surface. Their color ranges from skin-toned to slightly pink, light brown, or yellowish. The tops are flat (hence the name), and the texture is much smoother than a common wart.
What flat warts lack in size, they make up for in number. They tend to appear in large clusters, sometimes dozens or even hundreds at a time. Common locations include the face, the forehead, the shins, and the backs of the hands. In men, they frequently show up in the beard area, where shaving can spread the virus across the skin. In women, they often cluster on the legs for the same reason. This pattern of spread along a line of skin trauma is well documented and has been observed in people who undergo various hair removal procedures on affected areas.2PubMed Central. Cosmetic Warts: Pseudo-Koebnerization of Warts after Cosmetic Procedures for Hair Removal
Filiform Warts
Filiform warts have the most distinctive shape of any wart type. Instead of a broad bump, they form a narrow, finger-like or thread-like projection that sticks straight out from the skin. They are usually skin-colored or slightly darker, and the individual projections can be a few millimeters long. Some filiform warts have a single stalk, while others branch into several tiny fronds, giving them a spiky or brush-like appearance.
These warts strongly favor the face and neck. They commonly appear around the eyelids, lips, nose, and chin. Because of their location and their protruding shape, filiform warts are hard to hide and tend to bother people cosmetically more than other types. Despite their dramatic appearance, they are generally painless unless they snag on clothing or get irritated. They can also grow quickly compared to other warts, sometimes reaching noticeable size within a few weeks.
Periungual and Subungual Warts
Periungual warts grow around the edges of fingernails and toenails, while subungual warts develop underneath the nail plate. They start as small, rough bumps near the nail fold and can eventually spread under and around the nail itself. Over time, they may distort the shape of the nail, causing it to lift, thicken, or develop ridges. The wart surface has the same rough, cauliflower-like texture as a common wart, but the location makes them look and feel quite different.
Nail warts are the most common nail tumor encountered in clinical practice, and they can be particularly distressing because they reduce functionality and are hard to treat. The risk of spreading HPV to other skin and mucosal areas may be higher for fingertip warts specifically because the hands touch so many body surfaces throughout the day.3PubMed. Diagnosis and management of subungual and periungual verruca: A clinical review Treatment is also tricky, because aggressive removal near the nail matrix can cause permanent nail damage.
If you are a nail biter or a cuticle picker, you are at higher risk for periungual warts. The habit creates small breaks in the skin around the nail that let HPV gain entry. The warts can then spread from one nail to another through continued biting or picking.
Genital Warts
Genital warts, also called condylomata acuminata, look different from warts elsewhere on the body, largely because of the moist, thin skin in the genital and anal region. The classic genital wart is a soft, flesh-colored or pinkish growth with a bumpy, cauliflower-like surface. They typically appear on moist surfaces such as the inner labia, the vaginal opening, the penile shaft, or the perianal area.4PubMed. Clinical presentation and natural course of anogenital warts Genital warts can be single or appear in clusters, sometimes growing together into larger masses.
Not all genital warts look the same, though. On drier skin surfaces, such as the outer labia or the penile base, genital warts may be more keratotic (thickened and rough) and resemble common warts found on the hands. There are also flat, subclinical genital warts that are nearly invisible to the naked eye and can appear on any mucosal or skin surface in the area.4PubMed. Clinical presentation and natural course of anogenital warts The range of possible appearances is broad: lesions can be filiform, papillomatous, verrucous, or fungating in shape.5PubMed Central. Penile warts: an update on their evaluation and management
Because genital warts can look like several other conditions, including molluscum contagiosum, skin tags, and even certain cancers, any new growth in the genital area is worth getting checked by a healthcare provider rather than self-diagnosing.
The Black Dots and What Dermoscopy Reveals
Those tiny dark specks visible on the surface of many warts are one of the best ways to visually confirm that a skin growth is actually a wart. They are thrombosed capillaries, small blood vessels that have clotted inside the wart tissue. When the thickened top layer of skin is trimmed or scraped slightly, the capillaries become even more prominent and are easier to see.6Oxford Academic (British Journal of Dermatology). Differential diagnosis of plantar wart from corn, callus and healed wart with the aid of dermoscopy
When a dermatologist examines a wart with a dermatoscope (a handheld magnifying device with a light), the internal structure becomes much clearer. Common dermoscopic features include dotted and linear blood vessels, bleeding spots, and a papillomatous (bumpy, textured) surface pattern. The background color can appear red, whitish, or gray depending on the wart type and location.7PubMed Central. Dermoscopy Features of Cutaneous Warts This level of detail helps doctors distinguish warts from calluses, corns, and other growths that can look nearly identical to the naked eye.
Growths That Look Like Warts but Are Not
Several common skin conditions can be mistaken for warts, and the confusion runs in both directions. On the feet, calluses and corns are the most frequent look-alikes. A callus is a broad area of thickened skin caused by friction, while a corn is a smaller, focused point of thickened skin. Both lack the tiny black dots of a wart, and their surface patterns under magnification are smooth rather than dotted with blood vessels. Even so, distinguishing them from plantar warts with the naked eye can be genuinely difficult.8Oxford Academic (British Journal of Dermatology). Differential diagnosis of plantar wart from corn, callus and heeled wart with the aid of dermoscopy
In the genital area, molluscum contagiosum is a particularly common mimic. Molluscum lesions are small, round, dome-shaped bumps with a characteristic central dimple, but when they cluster together in the anogenital region, they can closely resemble genital warts.9PubMed. Atypical presentation of genital molluscum contagiosum mimicking genital warts Skin tags, seborrheic keratoses, and certain moles can also look wart-like on first inspection. If you are unsure whether a bump is a wart, a doctor can often tell by appearance alone or with the help of a dermatoscope. In ambiguous cases, a small biopsy settles the question definitively.
How Warts Spread Across Your Own Skin
One pattern that often alarms people is finding a line or cluster of new warts appearing along a scratch, a shaving path, or a site of minor skin trauma. This phenomenon is sometimes called pseudo-Koebnerization. It happens because the virus is already present in or on the skin, and the small wounds created by a scratch or a razor give it entry points to establish new infections in a neat row. Case studies have documented this pattern in people who developed lines of warts along areas where hair-removal procedures were performed, likely due to contaminated tools or the micro-injuries themselves creating openings for HPV.2PubMed Central. Cosmetic Warts: Pseudo-Koebnerization of Warts after Cosmetic Procedures for Hair Removal
This is why flat warts on the face and legs so often appear in clusters along shaving lines, and why nail biters tend to develop periungual warts on multiple fingers. The virus does not spread through the bloodstream; it moves along the surface of the skin, taking advantage of tiny breaks. Knowing this can help you avoid spreading warts to new areas. If you have an active wart on your hand, for instance, covering it with a bandage before handling other parts of your body reduces the chance of autoinoculation.
How Warts Look in Children Versus Adults
Warts are extremely common in children, with the infection peaking during the second decade of life and affecting over 40% of children in that age group.1PubMed Central. Paediatric Cutaneous Warts and Verrucae: An Update In kids, common warts and plantar warts dominate. The warts tend to be smaller individually but can appear in greater numbers, partly because children’s immune systems are still learning to recognize and fight HPV.
Children’s warts also have a higher rate of spontaneous resolution than adult warts. Many childhood warts disappear on their own within one to two years without treatment, as the immune system eventually mounts an effective response. Adults are less likely to see warts resolve spontaneously, which is one reason adults tend to seek treatment more aggressively. The visual appearance of warts in children is essentially the same as in adults, but the locations skew toward the hands and feet rather than the face or genital area, because skin-to-skin contact in playgrounds and swimming pools is how most childhood warts are acquired.
When Warts Look Unusual
Most warts in healthy people follow the recognizable patterns described above. But in people with weakened immune systems, warts can become unusually widespread, large, or resistant to treatment. Organ transplant recipients are a striking example: roughly 90% develop warts within five years of transplantation, and many of those warts appear in sun-exposed areas and look atypical compared to ordinary warts.10PubMed. Skin cancer and warts in immunosuppressed renal transplant recipients In these patients, the combination of immune suppression, ultraviolet radiation damage, and widespread HPV infection can produce warts that are larger, more numerous, and harder to distinguish from early skin cancers.
People with extensive, recalcitrant, or treatment-resistant warts may have an underlying immune impairment driving their susceptibility to HPV.11PubMed Central. Consideration of underlying immunodeficiency in refractory or recalcitrant warts: A review of the literature This is worth knowing because a handful of warts that refuse to clear up despite repeated treatment can occasionally be the first visible sign of a deeper immune system problem. If you find yourself dealing with warts that keep coming back or spreading despite treatment, it is reasonable to bring this up with your doctor so they can evaluate whether something more is going on.
Treatment for recalcitrant warts in immunocompromised patients often requires a different approach than standard cryotherapy. Options include immune-boosting creams, injections that stimulate a local immune response, and combination therapies, though even these do not always produce lasting clearance when the underlying immune deficiency persists.12PubMed Central. Treatment of Multiple Recalcitrant Warts in an Immunocompromised Patient Using Purified Protein Derivative (PPD) Injection: A Case Report
Why Warts Look the Way They Do
The rough, thickened texture of a wart is not random. HPV infects keratinocytes, the cells that make up the outermost layer of the skin. Once inside, the virus hijacks the cell’s machinery to produce more virus particles while also signaling the skin to grow faster and thicker at that spot. This accelerated growth of keratin-producing cells is what creates the raised, rough bump. The virus also stimulates the growth of new blood vessels to feed the expanding tissue, which is why those dark, clotted capillaries appear inside the wart.
Different HPV types prefer different body sites and produce slightly different growth patterns, which is why a flat wart on the face looks so different from a cauliflower-shaped genital wart or a deeply embedded plantar wart. Over 200 HPV types have been identified, and the ones that commonly cause skin warts (like HPV-2, HPV-27, and HPV-57) are distinct from the types that cause genital warts (mainly HPV-6 and HPV-11).1PubMed Central. Paediatric Cutaneous Warts and Verrucae: An Update The HPV types behind common skin warts are considered low-risk and do not cause cancer. The genital HPV types that cause visible warts (6 and 11) are also low-risk. The high-risk HPV types linked to cervical and other cancers rarely produce visible warts at all, which is part of what makes them dangerous: they do their work silently.
When to See a Doctor About a Wart
Most warts are harmless and do not require medical attention, but a few situations call for professional evaluation. Any growth in the genital or anal area should be examined by a healthcare provider to confirm it is a wart and to rule out other conditions. A wart that changes color rapidly, bleeds without being picked at, or has an irregular border may warrant a closer look to ensure it is not something else entirely. Warts on the face or near the eyes are better handled by a professional, since over-the-counter treatments containing salicylic acid can damage sensitive facial skin.
People with diabetes or poor circulation in the feet should avoid self-treating plantar warts, because the risk of infection or slow healing is higher. And anyone whose warts keep coming back despite treatment, or who develops an unusually large number of warts over a short period, should mention this to their doctor. As the research on immunodeficiency and recalcitrant warts makes clear, persistent or widespread warts can occasionally signal something worth investigating beyond the warts themselves.11PubMed Central. Consideration of underlying immunodeficiency in refractory or recalcitrant warts: A review of the literature