Warts are small, rough growths on the skin that typically feel like hard bumps. Most are skin-colored or slightly darker, ranging from 2 to 10 millimeters wide, and they often have a bumpy, textured surface that sets them apart from moles, skin tags, or other growths. What a wart looks like depends largely on what type it is and where it appears on your body.
Common Warts
Common warts show up most often on the hands and fingers. They feel like rough, firm bumps with a rounded or dome-shaped top. The surface is uneven and grainy, sometimes compared to the texture of a cauliflower. They range from the size of a pinhead to roughly the size of a pea.
One of the most recognizable features is the tiny black dots scattered across the surface. These are often mistaken for seeds, but they’re actually small blood vessels that have clotted inside the wart. These black dots are one of the most reliable visual signs that a bump is a wart rather than something else. If you were to shave the top layer off a wart (something a doctor might do to confirm a diagnosis), those dark spots would become even more visible.
Plantar Warts
Plantar warts grow on the soles of the feet, usually at the base of the toes, on the ball, or on the heel. Unlike common warts that dome outward, plantar warts are pushed inward by the pressure of standing and walking. This means they often don’t look like a raised bump at all. Instead, you’ll see a hard, thick patch of skin (similar to a callus) with a rough spot at the center.
A key visual clue is that plantar warts interrupt the normal lines and ridges on the bottom of your foot. If you look closely at the skin’s natural “fingerprint” pattern on your sole, a plantar wart will break that pattern. You may also see those same black dots found in common warts. Because they grow inward, plantar warts can feel like you’re standing on a pebble, which often draws attention to them before you even look.
Flat Warts
Flat warts look dramatically different from other types. They’re tiny, only 1 to 5 millimeters across (no bigger than a pinhead), and barely raised above the skin. Some are so subtle they’re not even noticeable by touch. Their tops are smooth rather than rough, which makes them easy to confuse with minor skin blemishes or irritation.
They tend to appear in clusters rather than as single growths, often on the face, the back of the hands, the neck, or the legs. Shaving is a common trigger: the razor nicks the skin and spreads the virus, so flat warts frequently line up along scratches or cuts. You might notice a patch of 20 or 30 small, smooth, slightly raised dots that all appeared around the same time.
Filiform Warts
Filiform warts have the most distinctive shape of any wart type. Instead of a rounded bump, they grow outward in thin, thread-like or spiky projections, sometimes resembling tiny brushes. They tend to be fast-growing and usually appear on the face, particularly around the eyelids, lips, nose, or chin. Their narrow, finger-like shape makes them easy to identify, though people sometimes confuse them with skin tags at first glance.
Genital Warts
Genital warts appear in the genital and anal areas and can vary widely in appearance. Some look like small, skin-colored bumps. Others cluster together into a cauliflower-like shape. They can be so small and flat that they’re invisible to the naked eye, or they can grow into noticeable swellings. Their color usually matches the surrounding skin or is slightly different. Because they’re caused by specific strains of the human papillomavirus (HPV) that are sexually transmitted, they require different management than warts elsewhere on the body.
How Warts Differ From Similar Growths
Several other skin growths can be mistaken for warts. Skin tags are one of the most common look-alikes, but there are clear differences. Skin tags are soft and flexible, while warts are hard and firm. Skin tags typically hang from the skin on a thin stalk or attach with a narrow base, whereas warts grow directly within the upper layer of skin with a broad base. Skin tags are also smooth, while most warts have a rough or textured surface.
Calluses can mimic plantar warts on the feet, but calluses preserve the natural skin ridge pattern while warts disrupt it. And calluses lack those telltale black dots. Moles are usually smoother, more uniform in shape, and often darker in color than warts. If a growth changes color rapidly, bleeds without being picked at, or has irregular borders, it’s worth getting a professional evaluation to rule out something other than a wart.
Features That Identify Any Wart
Despite the variety, most warts share a few universal traits. They grow in the outermost layer of skin. They disrupt the normal skin line patterns wherever they appear. They’re caused by HPV, which means they can spread to other parts of your body through touch or to other people through direct contact. And nearly all of them, when examined closely, will show those pinpoint dark dots from clotted blood vessels inside.
Warts can appear at any age but are especially common in children and teenagers, whose immune systems haven’t yet built resistance to the virus strains that cause them. Most warts are harmless and many eventually disappear on their own, though this can take months or even years. Their appearance alone is usually enough to identify them, but any growth you’re uncertain about is worth having a professional look at.