Genital warts are diagnosed primarily through a visual exam by a healthcare provider. There is no routine blood test, swab, or at-home kit that can tell you whether a bump is a genital wart. In most cases, a trained clinician can identify them just by looking, and additional testing is only needed when something about the growth looks unusual.
Visual Examination Is the Standard Test
According to CDC treatment guidelines, the diagnosis of genital warts is “usually made by visual inspection.” A provider looks at the size, shape, texture, and location of any growths. Genital warts are typically flat, raised, or stalk-like (pedunculated) bumps on the genital skin or mucous membranes. They can appear as a single bump or in clusters, sometimes described as having a cauliflower-like texture.
This means a standard appointment is straightforward. You show the provider the area that concerns you, and in many cases they can give you an answer on the spot. No lab work, no waiting for results. The exam itself takes only a few minutes.
When a Biopsy Is Needed
A biopsy, where a small tissue sample is removed and examined under a microscope, is not routine for genital warts. It’s reserved for growths that look atypical. The CDC specifically recommends biopsy when a lesion is pigmented (darker than surrounding skin), feels hard or fixed to the tissue underneath, bleeds, or has an ulcerated surface. These features can overlap with precancerous or cancerous changes, so the biopsy helps rule those out.
Warts that don’t respond to treatment after multiple rounds may also warrant a biopsy. If you’ve been treated several times and the growth persists or changes in appearance, your provider will likely want to confirm the original diagnosis.
HPV Tests Don’t Diagnose Genital Warts
This is a common point of confusion. HPV (human papillomavirus) causes genital warts, and there are HPV screening tests available. But those tests are designed to detect the high-risk HPV strains linked to cervical cancer. They are only recommended for cervical cancer screening in women aged 30 and older. They are not recommended for men, younger women, or adolescents.
Critically, the strains of HPV that cause visible warts (most commonly types 6 and 11) are low-risk strains that do not cause cancer. A cervical HPV screening test is not looking for them, and a negative HPV screening result does not mean you’re free of wart-causing strains. These are two separate clinical questions with two separate diagnostic paths.
No Reliable At-Home Test Exists
You may have seen at-home HPV test kits marketed online. These are not FDA-approved. The kits that do exist target high-risk cervical HPV strains, not the low-risk strains responsible for genital warts. Even if an at-home HPV test were accurate, it wouldn’t tell you whether a specific bump is a wart.
Self-diagnosis based on photos or symptom checkers is also unreliable because several harmless conditions closely resemble genital warts. An in-person exam remains the only dependable way to get a diagnosis.
Conditions That Look Like Genital Warts
Part of the reason a clinical exam matters so much is the long list of benign conditions that mimic warts. Some of the most common:
- Pearly penile papules: tiny, smooth, dome-shaped bumps arranged in rows around the head of the penis. They are a normal anatomical variation, not an infection.
- Fordyce spots: small, pale or yellowish bumps on the shaft of the penis, labia, or inner lips. These are visible oil glands and completely harmless.
- Skin tags (acrochordons): soft, flesh-colored growths that can appear in the groin or around the anus, especially in skin folds.
- Molluscum contagiosum: small, round, dimpled bumps caused by a different virus entirely.
- Vestibular papillomatosis: tiny finger-like projections on the vulvar vestibule that are a normal variant, often mistaken for warts.
A provider who sees these conditions regularly can usually distinguish them from warts within seconds. Trying to differentiate them yourself using online images often leads to unnecessary anxiety or, worse, false reassurance.
Testing for Internal Warts
Warts can develop in areas you can’t easily see or feel, including inside the vagina, on the cervix, inside the urethra, or inside the anal canal. Internal warts are typically discovered during a routine pelvic exam, a Pap smear (which may show cell changes prompting further inspection), or an anoscopy, where a provider uses a small scope to examine the anal canal.
If you have external warts near the anus, your provider may recommend an anoscopy to check whether warts extend internally. Similarly, warts at the urethral opening can sometimes extend deeper, though this is less common. These exams are quick and generally done in a clinic setting.
What to Expect at Your Appointment
If you’ve noticed a bump and want it checked, the process is simpler than many people expect. You’ll describe what you’ve noticed, the provider will examine the area visually (sometimes using a magnifying lens or bright light), and they’ll give you a diagnosis. If the growth is clearly a wart, treatment options can be discussed in the same visit.
You don’t need to prepare in any special way. Avoid applying creams or ointments to the area right before your appointment, as they can obscure the surface of the growth. If the bumps come and go or are hard to see, taking a photo when they’re most visible can help your provider even if the area looks different on the day of the exam.