A Pap smear tests for abnormal cells on the cervix, including precancerous changes that could develop into cervical cancer if they were never found or treated. It does not test for most sexually transmitted infections, ovarian cancer or uterine cancer. This guide from HeliosCheck.com explains what the test looks for, how it differs from the HPV test, how often you need it at each age, and what the results mean in brief.
Key Takeaways
- The Pap test (Pap smear) looks for abnormal or precancerous cells on the cervix.
- It does not check for STIs such as chlamydia or gonorrhea, or for ovarian or uterine cancer.
- The HPV test looks for the virus that causes most cervical cell changes; both tests can use the same sample.
- Screening starts at 21; from 30 to 65 you can choose an HPV test every 5 years, a co-test every 5 years or a Pap test every 3 years.
- An abnormal result usually means cell changes to watch or treat, not cancer.
What the Pap Test Looks For
During a Pap test, a doctor or nurse uses a speculum to see the cervix, the lower end of the uterus at the top of the vagina, and gently collects cells with a small brush or spatula. A lab then checks those cells under a microscope. As ACOG explains, the Pap test checks for abnormal changes in the cervix that could lead to cancer.
Almost all of these changes are caused by long-lasting infection with high-risk types of human papillomavirus (HPV). Most HPV infections clear on their own, but a persistent infection can slowly change cervical cells over several years. Finding those precancerous changes early means they can be monitored or removed before cancer ever develops, which is why regular screening works so well.
What a Pap Smear Does Not Test For
Because it is often done during a pelvic exam, many people assume a Pap test checks everything “down there.” It does not. A normal Pap result tells you nothing about:
- Sexually transmitted infections: chlamydia, gonorrhea, syphilis, herpes, trichomoniasis and HIV each need their own tests, often a urine sample, a swab or a blood test.
- Ovarian cancer: the ovaries are not sampled, and there is no routine screening test for ovarian cancer in people without symptoms.
- Uterine (endometrial) cancer: the test samples the cervix, not the lining of the uterus.
- Vaginal and vulvar conditions: these are checked by looking and, when needed, by other tests.
- Fertility or hormone levels: a Pap test does not measure either.
If you want STI testing, ask for it by name. And if you have symptoms such as bleeding after sex, bleeding between periods, pelvic pain or unusual discharge, get them checked even if your last Pap test was normal. Bleeding after menopause always needs a prompt visit, as our menopause guides explain.
Pap Test vs. HPV Test
The two tests answer different questions. The Pap test asks, “Do these cells look abnormal?” The HPV test asks, “Is a high-risk type of HPV present?” According to the National Cancer Institute, both can be done on the same sample of cells, and doing them together is called co-testing.
| Test | What It Checks | Typical Use |
|---|---|---|
| Pap test (cytology) | Whether cervical cells look abnormal or precancerous | Every 3 years from 21 to 29; an option from 30 to 65 |
| Primary HPV test | Whether high-risk HPV types are present | Every 5 years from 30 to 65 |
| Co-test | Both the cells and the virus, from one sample | Every 5 years from 30 to 65 |
HPV testing is not recommended as a first test in your twenties, because HPV is very common at that age and usually clears without causing problems.
How Often You Need a Pap Smear by Age
The U.S. Preventive Services Task Force sets out the cervical cancer screening schedule for people with a cervix who are at average risk:
| Age | Recommended Screening |
|---|---|
| Under 21 | No screening, whatever your sexual history |
| 21 to 29 | Pap test every 3 years |
| 30 to 65 | Primary HPV test every 5 years, co-test every 5 years, or Pap test alone every 3 years |
| Over 65 | Stop if you have had adequate negative screening in the past and are not at high risk |
| After a hysterectomy | Usually none if the cervix was removed and there is no history of high-grade precancer or cervical cancer |
Some people need screening more often or for longer, including those with HIV, a weakened immune system, a history of high-grade precancerous changes or cervical cancer, or exposure to DES before birth. Your doctor will tailor the plan if any of these apply. If you are booking your first screening, our guides on your first gynecologist visit and how to prepare for a gynecologist appointment cover what to expect and when to schedule it.
What Pap Smear Results Mean in Brief
Most results come back normal, also called negative. When they do not, the report uses a few standard terms:
- Unsatisfactory: the sample could not be read clearly, so the test is repeated.
- ASC-US: slightly unusual cells of uncertain meaning; an HPV test usually decides the next step.
- LSIL: low-grade changes, often caused by HPV, that frequently go away on their own.
- HSIL or ASC-H: higher-grade changes that are more likely to need a closer look and treatment.
- AGC: unusual glandular cells, which need further tests of the cervix and sometimes the uterine lining.
The usual next steps are a repeat test, an HPV test, or a colposcopy, a closer look at the cervix with a magnifying instrument. An abnormal result is common and rarely means cancer. If your result was HPV-positive, our detailed guide to cervical screening and HPV results walks through what each outcome means. You will find more on infections and screening in the sexual health section of HeliosCheck.com.
Frequently Asked Questions
Does a Pap Smear Hurt?
Most people feel pressure or brief discomfort rather than pain, mainly when the speculum is inserted. The sample itself takes only seconds. Relaxing your thigh and belly muscles helps, and you can ask for a smaller speculum or for the doctor to pause. Tell them if you have pain, as that is worth mentioning.
Do I Still Need Pap Tests After the HPV Vaccine?
Yes. The HPV vaccine protects against the types of HPV that cause most cervical cancers, but not every type, and it works best when given before any exposure. Vaccinated people should follow the same screening schedule as everyone else, starting at age 21, unless their doctor advises something different.
Do I Need a Pap Test If I Have Never Had Sex?
Current guidance starts screening at 21 for everyone with a cervix, regardless of sexual history. HPV spreads through skin-to-skin genital contact, not only intercourse, so the risk is low but not zero. If you have never had any sexual contact, talk with your doctor about your own risk and timing.
Do I Need Pap Tests If My Partner Is a Woman?
Yes. HPV can pass between partners of any gender through intimate skin contact, shared touch and sex toys. People with a cervix who have sex only with women can still develop cervical cell changes, so the same screening schedule applies. Let your doctor know about your partners so they can offer the right tests.
Talk to your doctor: This guide is for general information, not medical advice. Always talk to your own doctor or OB-GYN about your symptoms, and call 911 if you think you have an emergency.
Browse more plain-language guides to screening, periods and pelvic health at HeliosCheck.com.
