A wart in its earliest stage typically looks like a small, flesh-colored bump with a slightly rough or grainy texture. At first, it can be as small as a pinhead, making it easy to mistake for a pimple, callus, or just a patch of dry skin. The telltale signs that set a new wart apart are its grainy surface and, in many cases, tiny black dots that appear within the bump.
What a New Common Wart Looks Like
Common warts usually show up on your fingers or hands. The very first thing you’ll notice is a small spot where the skin feels rougher and slightly raised compared to the area around it. That’s the outer layer of skin thickening and hardening in response to the virus. At this point, the bump can be as small as a pinhead and flesh-colored or slightly lighter than your surrounding skin.
As the wart develops over the following days to weeks, it takes on a more distinct grainy texture, almost like a tiny piece of cauliflower. You may start to see black dots scattered across the surface. These are often called “wart seeds,” but they’re actually tiny blood vessels that have clotted inside the wart. Not every wart develops visible dots right away, but when they appear, they’re one of the most reliable visual clues that you’re looking at a wart and not something else. A fully formed common wart ranges from pinhead to pea-sized.
Early Plantar Warts on the Feet
Plantar warts grow on the soles of your feet, and because of constant pressure from walking, they develop differently. Instead of rising above the skin, early plantar warts tend to grow inward. The first sign is often a small, rough patch on the bottom of your foot that feels like you’re stepping on something hard.
One of the most useful early indicators is disrupted skin lines. The natural ridges and lines on the sole of your foot (similar to fingerprints) will break or bend around a developing plantar wart rather than passing straight through it. A callus, by contrast, preserves those lines. Like common warts, plantar warts often develop black pinpoints from clotted blood vessels, which become more visible as the wart matures.
Flat Warts: The Hardest to Spot Early
Flat warts are the most subtle type and frequently go unnoticed for a while. They tend to appear on the face, legs, or forearms. An early flat wart is only 1 to 5 millimeters across (no bigger than a pinhead) and barely raised above the skin surface. Some are so slightly elevated they’re almost invisible unless you look at the skin from an angle in good lighting.
Their color ranges from yellow to brown to pinkish, often blending with surrounding skin. Flat warts rarely appear alone. They tend to grow in clusters of dozens, which is sometimes the first thing that gets your attention: a patch of skin that looks slightly bumpy or textured where it was smooth before.
Filiform Warts Near the Eyes and Mouth
Filiform warts look different from other types. Instead of a round bump, they grow as thin, finger-like projections of skin, typically 1 to 2 millimeters long. They appear most often around the eyes, lips, nose, or chin. An early filiform wart may look like a tiny skin tag or a single thin spike poking out from the surface. They’re usually flesh-colored and grow quickly compared to other wart types, becoming noticeable within a few weeks.
How Long Before a Wart Becomes Visible
Warts are caused by HPV (human papillomavirus), and the virus doesn’t produce a visible wart immediately after you’re exposed. The incubation period varies widely. A wart can appear weeks, months, or even years after the initial infection. This long, unpredictable delay is why most people can’t pinpoint exactly when or where they picked up the virus.
During this invisible period, the virus is working inside the top layer of skin, causing cells to multiply faster than normal. The wart only becomes visible once enough thickened skin has built up to form a detectable bump. Most new warts don’t cause pain or itching. They’re typically painless when they first appear, though plantar warts can become tender under the pressure of walking as they grow.
Wart vs. Callus or Corn
Because early warts are small and flesh-colored, they’re easy to confuse with calluses or corns, especially on the feet. A few differences help you tell them apart:
- Texture: Warts have a grainy, fleshy surface. Corns and calluses are hard, smooth, and surrounded by dry, flaky skin.
- Black dots: Warts often develop black pinpoints from clotted blood vessels. Corns and calluses do not.
- Skin lines: A wart interrupts the natural lines and ridges of your skin. A callus forms over those lines without disrupting them.
- Pain pattern: Plantar warts tend to hurt when you squeeze them from the sides. Corns hurt more with direct downward pressure.
If you’re still unsure, gently paring away a thin layer of the thickened skin (after a shower, when the skin is soft) can help. A wart will reveal those characteristic black dots just below the surface, while a callus will simply show more smooth, hard skin underneath.