Most HPV infections cause no symptoms at all. The majority of people who contract human papillomavirus never know they have it, because their immune system clears the infection before any visible signs appear. When symptoms do show up, they range from harmless skin growths to warning signs of cancer, depending on which strain of the virus is involved.
There are more than 200 types of HPV. Some are considered low-risk and cause warts. Others are high-risk and can, over years, lead to cancer of the cervix, throat, anus, penis, vagina, or vulva. Understanding what each type looks like (or doesn’t) is key to knowing what to watch for.
Why Most People Never Notice an Infection
HPV is the most common sexually transmitted infection, and the vast majority of cases are completely silent. The virus spreads through skin-to-skin contact during vaginal, anal, or oral sex, and it’s communicable even when there are no visible signs of infection. That’s why it spreads so easily: the person passing it along typically has no idea they carry it.
Most infections resolve on their own. About 81% of low-risk HPV infections clear within 12 months, and the majority are gone within two years. For high-risk strains, roughly 51% to 81% clear within 14 to 19 months, depending on the specific type. The infections that don’t clear are the ones that can eventually cause problems.
Genital Warts: The Most Visible Symptom
When low-risk HPV strains do produce symptoms, they typically show up as genital warts. These are usually flat, raised, or stalk-like growths on the skin or mucous membranes of the genital area. They can appear as a single bump or in clusters, sometimes described as having a cauliflower-like texture.
In women, warts most commonly appear around the vaginal opening, but they can also develop on the cervix, vagina, perineum, or around the anus. In men, they tend to appear on the shaft of the penis, the scrotum, or around the anus. Genital warts rarely hurt, though they can itch or feel tender.
The timeline between exposure and the first visible wart varies widely. The incubation period ranges from three weeks to eight months, with an average of about three months. If left untreated, warts can grow larger or multiply, but they don’t turn into cancer. The strains that cause warts are different from the ones linked to cancer.
High-Risk HPV and Cervical Changes
High-risk HPV strains produce no warts and no early symptoms. That’s what makes them dangerous. These infections can persist silently for years, gradually causing abnormal changes in cervical cells that can progress to cancer if never detected.
Early cervical cell changes feel like nothing. There’s no pain, no discharge, no clue that anything is wrong. This is exactly why routine screening exists. By the time cervical cancer produces noticeable symptoms, it has already progressed. Those later-stage symptoms include vaginal bleeding after sex, between periods, or after menopause; periods that are heavier or longer than usual; watery or bloody vaginal discharge that may have a foul odor; and pelvic pain or pain during intercourse.
HPV Symptoms in the Throat
HPV can infect the throat through oral sex, and certain high-risk strains can cause oropharyngeal cancer, which affects the base of the tongue, tonsils, and back of the throat. Like cervical HPV, oral HPV infections are usually silent for years before any problems develop. Some people with oropharyngeal cancer have no symptoms at all when it’s first detected.
When symptoms do appear, they include a persistent sore throat that doesn’t resolve, earaches, hoarseness, swollen lymph nodes in the neck, difficulty or pain when swallowing, and unexplained weight loss. These symptoms overlap with many common, less serious conditions, which can delay diagnosis.
HPV Symptoms in Men
Men face a particular challenge with HPV because there’s no approved routine screening test for them. While women can catch high-risk infections through cervical screening, men typically discover HPV only if visible warts appear or if a cancer develops. Genital warts on the penis, scrotum, or around the anus are the most recognizable sign, but the high-risk strains that lead to penile, anal, or throat cancer produce no visible warning beforehand.
Anal cancer linked to HPV can cause symptoms like bleeding, pain, itching, or a lump near the anus. Penile cancer may show up as changes in skin color or thickness on the penis, or a sore that doesn’t heal. Both are uncommon but worth being aware of, especially for men with weakened immune systems.
How HPV Gets Detected Without Symptoms
Because high-risk HPV is almost always silent, screening is the primary way it’s found. Current guidelines recommend cervical cancer screening for women aged 21 to 65. For women 21 to 29, a Pap test every three years is the standard approach. Starting at age 30, the preferred method shifts to an HPV-specific test every five years, though a combined Pap and HPV test every five years is also an option. Women 30 and older can also use self-collected HPV testing, which has been recognized as an appropriate screening method.
If a screening test comes back positive for high-risk HPV or shows abnormal cells, follow-up testing may include a closer examination of the cervix (colposcopy) or a biopsy to check for precancerous changes. Finding these changes early is the entire point. Precancerous cells can be treated and removed long before they become cancer.
For men, there’s no equivalent routine screening. However, men who are at higher risk for anal cancer (including men who have sex with men and those who are immunocompromised) may benefit from discussing anal screening with a healthcare provider.
The Difference Between Low-Risk and High-Risk Strains
One of the most important things to understand about HPV symptoms is that the strains you can see are not the ones most likely to cause serious harm. Low-risk strains (primarily types 6 and 11) cause about 90% of genital warts. These warts can be annoying and stressful, but they’re not precancerous. High-risk strains (primarily types 16 and 18) cause no visible growths at all, yet they’re responsible for the vast majority of HPV-related cancers.
This means that having no symptoms is not the same as having nothing to worry about. It also means that finding genital warts, while understandably alarming, doesn’t indicate a cancer risk from that particular infection. They’re caused by entirely different viral types. Both scenarios call for different responses: warts can be treated for comfort and cosmetic reasons, while high-risk HPV requires monitoring through regular screening to catch cell changes early.