Genital warts on the penis typically look like small, skin-colored or slightly darker bumps with a rough texture. They can appear as a single bump or in clusters that resemble cauliflower. Individual warts are often around 5 millimeters across, though they can grow larger over time if untreated. Some are so small and flat they’re nearly invisible to the naked eye.
Color, Texture, and Shape
Most penile warts are flesh-colored, meaning they blend closely with the surrounding skin. They can also appear pink, brown, or slightly darker than your natural skin tone. The surface is rough or bumpy rather than smooth, which is one of the key features that sets them apart from other genital bumps.
Shape varies. A single wart may look like a small raised bump or a flat, barely noticeable patch. When several warts grow close together, they merge into a larger mass with an irregular, cauliflower-like surface. Warts can also be pedunculated, meaning they sit on a narrow stalk rather than lying flat against the skin. This range of appearances is part of what makes self-diagnosis tricky.
Where They Appear on the Penis
Genital warts can develop anywhere along the shaft of the penis, on the scrotum, around the foreskin, or near the tip. They can also appear around the anus, even without anal sex, because HPV spreads across the wider genital area through skin-to-skin contact. In less common cases, warts grow just inside the opening of the urethra, where they may not be visible but can cause changes in urine flow or slight discomfort.
The location matters because it helps distinguish warts from harmless look-alikes. Warts scattered along the shaft or scrotum are in a very different pattern than the uniform rows of bumps that appear only around the head of the penis (more on that below).
How Quickly They Show Up
Genital warts don’t appear right after exposure. About two-thirds of people who have sexual contact with someone carrying the virus develop visible warts within three months. But the incubation period can stretch much longer, sometimes six months or more, which makes it difficult to pinpoint exactly when or from whom you contracted HPV.
Some people carry the virus without ever developing visible warts. In these subclinical cases, the infected skin may show only subtle changes, like slightly raised, well-bordered patches that are invisible without magnification or special testing. This is one reason HPV spreads so easily: many carriers don’t know they have it.
What Causes Them
Genital warts are caused by human papillomavirus (HPV), specifically low-risk strains, most commonly types 6 and 11. “Low-risk” means these strains cause warts but are not the types linked to cancer. HPV is the most common sexually transmitted infection, and it spreads through direct skin-to-skin contact during vaginal, anal, or oral sex. Condoms reduce the risk but don’t eliminate it, since the virus can live on skin not covered by a condom.
Bumps That Look Similar but Aren’t Warts
Pearly Penile Papules
These are the most common source of confusion. Pearly penile papules are tiny, dome-shaped bumps that line up in neat rows around the ridge of the penis head. They’re the same color as the surrounding skin or slightly white, and they have a smooth, uniform appearance. The critical differences: papules form in organized rows exclusively around the head of the penis, they’re all roughly the same size, and they don’t spread or change over time. Genital warts, by contrast, are irregular in size and shape, have a rougher surface, and can appear anywhere on the shaft or scrotum. Pearly papules are completely harmless and not caused by any infection.
Molluscum Contagiosum
Molluscum bumps are firm, dome-shaped, and either white or flesh-colored. Their signature feature is a small dimple or indentation in the center of each bump, and they may contain clear or white fluid. Genital warts lack this central dimple and have a rougher, more irregular texture. Molluscum is also caused by a virus and is contagious, but it’s a different infection that requires different treatment.
Physical Sensations
Most genital warts don’t hurt. They’re often discovered visually or by touch rather than because of pain. Some people notice mild itching or tenderness in the area, and warts in certain locations can bleed or become irritated during sex. But many warts cause no sensation at all, which is another reason they can go unnoticed for weeks or months before someone spots them.
What Happens if They Grow
Left untreated, genital warts can stay the same size, grow larger, or multiply into clusters. A single small bump may eventually develop into a larger cauliflower-shaped mass. In some cases, the immune system clears the virus on its own and warts shrink or disappear without treatment, but this can take months to years. Treatment options range from topical solutions applied at home to in-office procedures like freezing or laser removal. Warts often respond well to treatment, though recurrence is common because the underlying virus can remain in the skin even after warts are gone.
If you’ve noticed a bump and you’re unsure what it is, the most reliable next step is a visual examination by a healthcare provider. They can usually distinguish warts from papules, molluscum, or other conditions on sight, and if there’s any doubt, a biopsy provides a definitive answer.