Most people with HPV never know they have it. The virus rarely causes symptoms, there’s no general-purpose blood test for it, and the only routine screening available targets cervical cancer in women. About 42.5% of U.S. adults aged 18 to 59 have some form of genital HPV, making it the most common sexually transmitted infection in the country. If you’re sexually active, chances are high you’ve been exposed at some point.
That doesn’t mean HPV is harmless. Certain strains can cause genital warts, and others can lead to cancer years down the line. Knowing how the virus shows up, what testing exists, and what signs to watch for is the most practical thing you can do.
Most HPV Infections Have No Symptoms
HPV is a group of more than 200 related viruses, and the vast majority of infections clear on their own within one to two years without ever causing a noticeable problem. Your immune system fights off the virus the same way it handles a common cold, and you may never realize anything happened. This is why HPV spreads so easily: people pass it to partners during a period when they feel perfectly fine and have no visible signs.
When symptoms do appear, the timeline varies widely. Genital warts can show up anywhere from one to 20 months after exposure, with two to three months being typical. High-risk HPV strains that cause cellular changes leading to cancer work on a much longer timeline. It can take up to 10 years for a high-risk infection to develop into cancer, which is why routine screening matters so much even when you feel healthy.
Signs You Can See or Feel
The only visible sign of HPV is genital warts, which are caused by low-risk strains (most commonly types 6 and 11) that don’t cause cancer. They appear as flat, raised, or stalk-like growths on the genital skin or mucous membranes. They’re usually skin-colored or slightly lighter and painless, though they can itch.
In women, warts most commonly appear around the vaginal opening, on the vulva, perineum, or around the anus. In men, they tend to show up on the shaft of the penis, under the foreskin in uncircumcised men, and on the scrotum or perianal skin. Warts can also develop in less visible places like the cervix, vagina, urethra, or inside the anal canal, where you wouldn’t notice them on your own.
A doctor diagnoses genital warts through a visual exam. HPV testing isn’t used to confirm them because knowing the specific strain wouldn’t change the treatment. If a wart looks unusual (pigmented, bleeding, hardened, or ulcerated), a biopsy may be done to rule out something more serious.
High-risk HPV strains, the ones linked to cancer, produce no warts and no symptoms in their early stages. You won’t feel them. That’s why they require screening tests to detect.
How HPV Screening Works for Women
Cervical cancer screening is the only routine clinical test for HPV, and it’s available exclusively for people with a cervix. There are three options, and the right one depends on your age.
If you’re 21 to 29, the recommendation is a Pap test every three years. A Pap doesn’t test for HPV directly. Instead, it collects cells from your cervix and checks them under a microscope for abnormal changes that HPV might be causing. If abnormalities show up, your provider may then order an HPV test to determine whether a high-risk strain is involved.
If you’re 30 to 65, you have more options. You can get an HPV-only test (called primary HPV testing) every five years, an HPV test combined with a Pap every five years, or a Pap alone every three years. The HPV test is more sensitive than the Pap. In one large trial, HPV testing caught 95% of significant precancerous changes compared to 55% for the Pap test alone. The tradeoff is that HPV testing flags slightly more false positives, since it detects infections that your body may clear on its own.
After age 65, you can generally stop screening if your last several tests over the prior 10 years were normal and you’ve never been treated for precancerous cervical changes.
What Happens After an Abnormal Result
A positive HPV test or an abnormal Pap doesn’t mean you have cancer. It means your provider needs to take a closer look. The next step depends on your individual risk, which factors in your current results, your screening history, any past treatments for precancerous changes, and your age.
For minor abnormalities, you might simply be asked to repeat the test in one to three years to see if the changes resolve. For more concerning findings, like high-grade cell changes or atypical glandular cells, your provider will typically recommend a colposcopy. This is a procedure where a magnifying instrument is used to closely examine the cervix, and small tissue samples can be taken for biopsy. The biopsy determines whether precancerous cells are present and how advanced they are, which guides treatment decisions.
Why There’s No Routine Test for Men
There is no approved screening test for HPV in men. No swab, blood draw, or urine test is recommended for routine use. This isn’t an oversight; it’s because no screening method has been shown to reduce cancer rates in men the way cervical screening does in women.
HPV causes about 23% of high-risk genital infections in men, but most of those infections clear without consequences. When HPV does cause problems in men, it shows up as genital warts (diagnosed visually) or, more rarely, as cancers of the penis, anus, or throat. These cancers are diagnosed through biopsies when symptoms or suspicious lesions appear, not through preemptive HPV screening. For throat cancer in particular, HPV status is tested during the workup of a diagnosed tumor, not beforehand.
Men who are at higher risk for anal cancer, including men who have sex with men and those who are immunocompromised, may benefit from anal Pap tests, though this isn’t yet a universal guideline. If you fall into a higher-risk group, it’s worth asking about anal cancer screening specifically.
High-Risk vs. Low-Risk Strains
Not all HPV is created equal. Of the many strains that infect people, 12 are classified as high-risk: types 16, 18, 31, 33, 35, 39, 45, 51, 52, 56, 58, and 59. These strains can cause six types of cancer, including cervical, anal, throat, penile, vaginal, and vulvar cancers. HPV 16 and 18 alone are responsible for the majority of HPV-related cancers.
Low-risk strains, primarily types 6 and 11, cause genital warts but not cancer. Having warts doesn’t mean you’re at increased cancer risk from those particular strains, though it’s possible to be infected with both low-risk and high-risk types at the same time.
What You Can Actually Do
If you’re a woman between 21 and 65, keep up with cervical cancer screening on the recommended schedule. An HPV-only test every five years (starting at age 30) is the most sensitive option available. If you’ve been putting off screening, a single test can tell you whether you’re currently carrying a high-risk strain.
If you’re a man, or if you’re a woman but concerned about HPV in areas other than the cervix, there’s no routine test to request. Your best tools are awareness and vaccination. The HPV vaccine is approved for people up to age 45 and protects against the strains most likely to cause cancer and warts. If you notice any new growths, persistent sores, unexplained bleeding, or a lump in the genital or throat area, those warrant a medical evaluation regardless of your HPV status.
For everyone, it helps to know that a single normal screening result doesn’t guarantee you’ve never had HPV. It means you don’t currently have a detectable high-risk infection causing cervical changes. And a positive result doesn’t mean cancer is inevitable. Most high-risk HPV infections are cleared by the immune system, and the ones that persist are caught early through follow-up screening long before they become dangerous.