Warts are small, rough skin growths with a hard, grainy surface. They typically range from 1 millimeter to 1 centimeter or more across, feel bumpy or scaly to the touch, and often contain tiny black dots. Those dots are not “seeds,” as many people believe. They’re actually small blood vessels that have clotted inside the wart. Beyond that basic description, warts can look surprisingly different depending on where they grow and which type you’re dealing with.
Common Warts on Hands and Fingers
The warts most people picture are common warts, which show up primarily on fingers, hands, and around the nails. They appear as small, raised bumps with a rough, cauliflower-like surface. The color is usually skin-toned or slightly grayish, and the texture feels grainy, almost like sandpaper. A scattering of black pinpoints across the surface is the hallmark feature. These are clotted capillaries feeding the wart from inside.
Common warts have a broad base and sit firmly on the skin rather than dangling or hanging. They can appear alone or in clusters, and they tend to grow slowly over weeks or months. Early on, a common wart may look like a small, slightly rough patch of skin that’s easy to dismiss. Over time, it becomes more raised, more textured, and more obviously distinct from the surrounding skin.
Plantar Warts on the Feet
Plantar warts grow on the soles of the feet, and they look quite different from hand warts because body weight pushes them inward. Instead of rising above the skin’s surface, a plantar wart grows deep beneath a hard, thick layer of callused skin. What you see on the surface is often a flat, tough patch with a defined border, sometimes with the same black dots visible in the center.
Because they’re pressed flat, plantar warts are frequently mistaken for calluses or corns. The key visual difference: warts have a grainy, fleshy appearance with those black pinpoints, while corns look like a raised, hard bump surrounded by dry, flaky skin without the dots. Plantar warts also tend to hurt when you squeeze them from the sides, while corns are more painful with direct downward pressure.
Flat Warts
Flat warts are the subtlest type and the easiest to overlook. They’re very small, between 1 and 5 millimeters across (no bigger than the head of a pin), and they barely rise above the skin’s surface. Their color ranges from yellow to brown to pinkish, often close to your natural skin tone. The surface is smoother than other warts, without the rough, cauliflower texture.
What makes flat warts distinctive is their numbers. They almost always appear in clusters, sometimes 20 or 30 at a time, and occasionally 100 or more. They commonly show up on the face, forehead, backs of hands, or legs. On the face, they can look like a patch of slightly bumpy, discolored skin rather than obvious individual growths. In children, they frequently appear along a scratch line or area of skin irritation.
Filiform Warts on the Face
Filiform warts look nothing like other warts. They grow as long, narrow, finger-like projections that extend 1 to 2 millimeters outward from the skin. They’re skin-colored and often appear around the lips, eyelids, neck, or chin. Because of their shape, they can resemble a tiny skin tag at first glance, but they’re firmer and more pointed.
These warts tend to grow quickly compared to other types and are particularly noticeable because of their location on the face. They’re usually painless unless they’re in a spot that gets rubbed or irritated by clothing or shaving.
Genital Warts
Genital warts appear on or around the genitals and anus. They can be flat, raised, or have a stalk-like base. In texture, they range from smooth to bumpy, and larger clusters can develop a cauliflower-like appearance. They’re typically flesh-colored or slightly darker and can appear at multiple sites at once, including areas that aren’t easily visible.
These warts are caused by different strains of the same virus family (HPV) that causes other warts, and they’re transmitted through sexual contact. They can be very small and difficult to spot, which is one reason they spread easily.
Warts vs. Skin Tags vs. Moles
A colorless flap of skin that looks like a little balloon hanging by a thin stalk is a skin tag, not a wart. Skin tags are soft, sit on the surface, and dangle. Warts are hard, have a broad base, and grow deep into the skin with a rough, scaly surface.
Moles can be trickier to distinguish because they also have a broad base and go deep into the skin. The difference is texture: the skin on a mole stays soft and smooth, while wart skin is rough and possibly pointed on the surface. Moles are also usually uniform in color (brown or black), while warts tend to be skin-colored, grayish, or yellowish with those characteristic black dots.
When a “Wart” May Be Something Else
Most warts are harmless, but certain skin cancers can mimic their appearance. This is especially true on the feet, where a type of melanoma that lacks the usual dark pigment can look remarkably like a plantar wart. In one review of 53 melanoma cases on the feet, 18 were initially misdiagnosed as something benign, including warts, calluses, and fungal infections. Nearly half of those misdiagnosed cases were the colorless variety that closely resembles a wart’s thick, rough surface.
A few features should prompt a closer look:
- Growth that doesn’t respond to treatment. Warts that persist or enlarge despite standard treatment warrant a biopsy.
- Bleeding or ulceration. Warts can bleed if picked at, but spontaneous bleeding or open sores are unusual.
- Color changes. A wart that develops irregular pigmentation, especially dark streaks or multiple colors, needs evaluation.
- New growths after age 50. While warts can occur at any age, new rough growths on the feet or hands in older adults deserve more scrutiny.
How Warts Change Over Time
A wart in its earliest stage may be barely visible, just a tiny area where the skin feels slightly different or looks a bit shinier than usual. Over several weeks, it develops its characteristic rough texture and begins to rise above the surrounding skin. The black dots typically become visible as the wart matures and develops its own blood supply.
A wart that’s resolving, whether on its own or from treatment, gradually flattens and loses its rough surface. The black dots may darken temporarily as the blood vessels inside clot off. The skin slowly returns to its normal texture, though it can take weeks to months for the area to look completely normal. Some warts leave no trace, while others leave a faint flat spot where the thickened skin was.