HPV does not automatically cause cancer, but certain types of HPV can lead to it over time

Human papillomavirus (HPV) is a common virus that most sexually active people encounter at some point. Your immune system clears it on its own in the vast majority of cases—usually within one to two years. Cancer develops only when a high-risk type of HPV persists in your body for years without being cleared, and even then, it happens in a small percentage of people who carry those types.

The connection exists, but it is not a direct line from infection to cancer. Understanding the difference between carrying HPV and developing cancer-related disease is the first step in knowing what screening and prevention actually do.

Key Takeaways

  • About 13 types of HPV are considered high-risk for cancer; most people who get infected clear the virus without treatment.
  • Cervical cancer is the most common HPV-related cancer, but HPV can also lead to cancers of the throat, anus, vulva, vagina, and penis.
  • The HPV vaccine prevents infection with the high-risk types before exposure and works best when given before sexual activity begins.
  • Regular screening (Pap tests or HPV tests) catches precancerous changes in the cervix before they become cancer, which is why screening has dramatically reduced cervical cancer deaths.
  • Most people with HPV never develop cancer because their immune system clears the virus; persistent infection is what raises the risk.

Which types of HPV cause cancer

There are more than 200 types of HPV, but only about 13 are classified as high-risk for cancer. The two most dangerous are HPV-16 and HPV-18, which together account for roughly 70 percent of cervical cancers and a large share of other HPV-related cancers. The remaining high-risk types cause cancer less frequently but still pose a risk with long-term infection.

Low-risk types of HPV cause genital warts but do not lead to cancer. Most people who get infected with any type of HPV—high-risk or low-risk—never know it because they have no symptoms and their body clears the virus naturally.

How HPV infection becomes cancer

Cancer develops through a process that usually takes years. When a high-risk HPV type infects cells in the cervix, throat, or anus, the virus can cause those cells to change. If your immune system does not clear the infection, the abnormal cells may continue to change over time, eventually becoming precancerous and then cancerous.

This progression is not inevitable. Most people who carry high-risk HPV never develop cancer because their immune system eventually clears the virus. The people at highest risk are those whose immune systems are weakened—such as people with untreated HIV—or those who have persistent infection with the same high-risk type for many years.

Smoking, long-term use of oral contraceptives, and having multiple sexual partners are factors that may increase the risk of progression from persistent infection to cancer, though HPV itself is the necessary starting point.

Cervical cancer and HPV screening

Cervical cancer is the HPV-related cancer most people hear about, and it is also the one where screening has made the biggest difference. A Pap test detects abnormal cells in the cervix before they become cancer. An HPV test detects the presence of high-risk HPV types. Many screening programs now use HPV testing, sometimes alone and sometimes alongside a Pap test, depending on your age and screening history.

Screening has reduced cervical cancer deaths dramatically in countries with regular screening programs. The goal is to find and treat precancerous changes—which are highly treatable—before they progress to cancer. This is why screening recommendations exist and why they are based on age and risk factors rather than symptoms (since precancerous changes usually cause no symptoms).

Other cancers linked to HPV

HPV can cause cancers beyond the cervix. High-risk HPV types are found in a significant portion of throat cancers (oropharyngeal cancers), anal cancers, and cancers of the vulva, vagina, and penis. The exact percentage varies by cancer type and geography, but HPV-related throat cancer has become more common in recent decades, particularly in people assigned male at birth.

Screening for these cancers is less standardized than cervical cancer screening. There is no routine screening test for HPV-related throat or anal cancer in most healthcare settings, though people with symptoms or known risk factors may be evaluated. This is an area where medical guidance continues to evolve as more data becomes available.

HPV vaccination and cancer prevention

The HPV vaccine prevents infection with high-risk HPV types before exposure occurs. It is most effective when given before sexual activity begins, which is why it is recommended for people in their early teens, though it can be given up to age 45 in some cases. The vaccine does not treat an existing HPV infection—it only prevents future infection with the types it covers.

Current vaccines protect against HPV-16 and HPV-18 (the two highest-risk types) and sometimes additional types depending on which vaccine is used. Studies show that vaccination has reduced the rate of precancerous cervical changes and genital warts in vaccinated populations. Over time, as more people are vaccinated, cervical cancer rates are expected to decline further.

What to do if you have been exposed to HPV

If you know you have been exposed to HPV or have tested positive for it, the next step depends on what type of HPV and where it was detected. For cervical HPV, your healthcare provider will likely recommend follow-up testing or monitoring based on the specific type and any cell changes found on a Pap test. Most people with HPV need only monitoring, not immediate treatment.

If you have not been vaccinated and are within the age range for vaccination, discussing the vaccine with your healthcare provider is reasonable, as it can still prevent infection with types you have not yet encountered. If you have symptoms like genital warts or abnormal bleeding, those warrant evaluation regardless of HPV status, as they may indicate something else or a need for treatment.

Frequently Asked Questions

If I test positive for HPV, does that mean I will get cancer?

No. Most people who test positive for HPV clear the virus without developing cancer. Cancer risk is higher with persistent infection of high-risk types, but even then, many people never develop cancer. Regular screening catches precancerous changes before they become cancer, which is why follow-up testing matters more than the positive result itself.

Can HPV be treated?

There is no cure for HPV infection itself—your immune system must clear it. However, precancerous changes caused by HPV can be treated through procedures like colposcopy with biopsy or removal of abnormal tissue. Treatment of precancerous changes is highly effective at preventing cancer from developing.

Should I get the HPV vaccine if I am already sexually active?

The vaccine works best before exposure to HPV, but it can still be given to people who are sexually active, up to age 45 in some cases. It will not treat an existing infection, but it can prevent infection with types you have not yet encountered. Talk with your healthcare provider about whether vaccination makes sense for your situation.

How often should I be screened for cervical cancer if I have HPV?

Screening frequency depends on what type of HPV you have, what your Pap test showed, and your age. Your healthcare provider will recommend a follow-up schedule based on these factors. Some people need testing every three years, others every five years, and some may need more frequent monitoring if abnormal cells are found.

Can men get screened for HPV-related cancer?

There is no routine screening test for HPV-related cancers in men. The HPV vaccine is recommended for men up to age 21 (and up to 26 in some cases) to prevent infection. Men with symptoms like persistent sore throat, anal bleeding, or genital lesions should see a healthcare provider for evaluation.