In short
Cervical screening (the smear test) checks a small sample of cells for high-risk HPV and, if found, for cell changes. It is not a test for cancer — it finds changes early so they can be treated before cancer develops. In the UK, women and people with a cervix aged 25 to 64 are invited every three to five years.
Cervical screening is one of the most effective cancer-prevention programmes there is. Unlike most screening, it does not just find cancer early — it can stop cancer from ever developing, by spotting and treating early cell changes years before they would become a problem.
Many people feel nervous about the test, which is completely understandable. Knowing what happens and why can make it feel much more manageable.
Who is invited and how often?
In the UK, cervical screening is offered to women and people with a cervix aged 25 to 64. You are usually invited every three years between 25 and 49, and every five years between 50 and 64, although exact intervals can depend on your results and where you live.
Invitations come by letter. If you have ever had any symptoms — such as unusual bleeding — do not wait for your screening invitation; see a GP, as screening is for people without symptoms.
What happens during the test?
The test is quick and done by a nurse or doctor. You undress from the waist down and lie on a couch. A smooth instrument called a speculum is gently inserted into the vagina so the cervix can be seen, and a small soft brush collects a sample of cells. It usually takes only a few minutes.
It may feel uncomfortable or a little odd, but it should not be painful. You can ask for a female sample-taker, take someone with you, and ask them to stop at any time. Telling the nurse if you feel anxious or have found it difficult before means they can help make it easier.
What are understanding your results?
The sample is first tested for high-risk HPV. If no high-risk HPV is found, your risk is very low and you will simply be invited again at your next routine date. If high-risk HPV is found, the same sample is checked for cell changes.
If cell changes are found, you will be invited for a closer look at the cervix called a colposcopy, and any abnormal cells can be treated. It is important to remember that abnormal results are common and usually do not mean cancer — they mean early changes have been caught at exactly the stage when they are easiest to treat.
What are the key takeaways?
- Cervical screening can prevent cancer by finding and treating early cell changes before they develop.
- It is offered to women and people with a cervix aged 25 to 64, every three to five years.
- The sample is tested for high-risk HPV first, then for cell changes if HPV is found.
- The test takes a few minutes and should not be painful; you can ask for adjustments to feel more comfortable.
- Abnormal results are common and usually do not mean cancer — they mean changes were caught early.
Care like this is out of reach for millions
The diagnosis, screening and treatment described here are routine in the UK. In Pakistan, Indonesia and Malaysia, poverty puts them out of reach — so a treatable cancer too often becomes a fatal one. World Aid Network funds treatment through locally-licensed oncologists for patients who cannot pay.
Frequently asked questions
Does cervical screening hurt?
Most people find it uncomfortable rather than painful, and it is over in a few minutes. If you feel anxious or have found it difficult in the past, tell the nurse — they can use a smaller speculum, give you more time, and let you stop at any point. You can also ask for a female sample-taker.
What does an abnormal smear result mean?
An abnormal result usually means high-risk HPV and sometimes early cell changes were found — not that you have cancer. You may be invited for a colposcopy (a closer look at the cervix), and any abnormal cells can be treated early. These changes are very treatable when caught at this stage.
Do I need screening if I have had the HPV vaccine?
Yes. The HPV vaccine protects against most but not all high-risk HPV types, so screening is still important even if you have been vaccinated. Together they give the best possible protection against cervical cancer.
Can I be screened if I am over 64?
Routine invitations stop at 64 for most people, because those who have had normal results are at very low risk. If you have never been screened, have had recent abnormal results, or have symptoms, you can still be screened — speak to your GP.
This guide is general information, not medical advice. It was reviewed by the World Aid Network editorial team for accuracy against NHS and World Health Organization sources. Always speak to a GP or qualified clinician about your own health.