Cervical cancer usually develops slowly over many years and the pre-cancerous stage often has no symptoms.
That is why you should not wait until you have abnormal bleeding, pelvic pain or changes in vaginal discharge before getting checked.
But a very common question is:
At what age should screening start? And does it need to be done every year?
The short answer: not everyone needs annual screening. The interval is usually 3–5 years or longer, depending on the type of test and the guidelines being applied.
Which tests are used for cervical cancer screening?
There are three common approaches at present.
1. Primary HPV testing
The HPV test looks for high-risk HPV types that can cause pre-cancerous lesions and cervical cancer.
According to the ACS, this is currently the preferred method for people at average risk aged 25–65.
If the result is negative, a test on a cervical sample taken by a healthcare professional can usually be repeated after 5 years.
The WHO also prefers HPV DNA testing and suggests an interval of 5–10 years in screening programmes for the general population.
2. Pap smear
The Pap smear does not look for the HPV virus.
This test examines cells taken from the cervix to detect abnormal or pre-cancerous changes.
If the Pap smear is used on its own and the result is normal, many guidelines use an interval of about 3 years.
3. Co-testing: HPV + Pap smear
Co-testing means performing the HPV test and the Pap smear at the same time.
According to the ACS, if co-testing is used and the result is normal, the interval can be 5 years.
So how often should screening be done?
If you are in the average-risk group, a simple way to picture it is:
Method Typical interval
Primary HPV test About 5 years
HPV + Pap co-test About 5 years
Pap smear alone About 3 years
However, this is a reference schedule, not a fixed schedule for every woman.
For example, if HPV is positive or the Pap smear shows abnormal cells, you may need to be re-checked much sooner.
Why is annual screening not necessary?
It may sound as though “the more often you check, the safer you feel”, but in cervical cancer screening, more is not always better.
Most HPV infections are cleared by the immune system without causing cancer.
Testing too often can pick up changes that would have resolved on their own, which can lead to:
- Unnecessary anxiety
- Additional tests
- Unnecessary colposcopy or biopsy
- Overtreatment in some cases
That is why guidelines use intervals of several years instead of requiring an annual Pap smear or HPV test.
When is more frequent screening needed?
The 3–5 year schedule is mainly for people at average risk with normal previous results.
You may need a personalised schedule if:
- High-risk HPV is positive
- A Pap smear has been abnormal
- You have had pre-cancerous cervical lesions
- You have been treated for CIN2, CIN3 or a high-grade lesion
- Your immune system is weakened
- You are living with HIV
- You have a history of cervical cancer
In these cases, you should not apply the “check once every 5 years” schedule on your own.
Your doctor will decide when to re-check based on your specific results.
Do you need to continue screening after 65?
Not everyone needs to continue for life.
According to the ACS, most people over 65 years of age can stop screening if they have been screened adequately in previous years, have had normal results and have no history of serious pre-cancerous lesions or cervical cancer.
Conversely, if you have never been screened adequately, you should not assume that after the age of 65 there is no longer any need to be checked.
If you are no longer sexually active, do you still need screening?
You may still need it.
The risk of cervical cancer does not depend only on whether you are currently sexually active.
An HPV infection can remain in the body for many years before causing changes in the cervix.
The ACS recommends that people in the screening age range continue to be checked even if they are not currently sexually active or are in a long-term relationship.
If you have symptoms, should you wait for your screening appointment?
No.
Screening is intended for people who do not yet have symptoms.
If you develop:
- Bleeding after intercourse
- Bleeding between periods
- Bleeding after the menopause
- Blood-stained or abnormal vaginal discharge
- Persistent pelvic pain
- Pain during intercourse
see a gynaecologist instead of waiting for your next Pap smear or HPV test.
Your doctor may need to examine you in person, perform a colposcopy or carry out other investigations.
A simple way to remember
If you find it hard to keep track of too many milestones, remember three things:
1. Do not wait for symptoms before being screened.
2. The HPV test usually has a longer interval than the Pap smear.
3. An abnormal result = a personalised follow-up schedule, not the usual one.
And most importantly:
Know when your most recent test was and what the result was.
Tracking your screening schedule on Halza
With Halza, you can store your HPV and Pap smear results together with your health records, so that previous tests are easy to look back on.
You can also browse and book gynaecology consultations, HPV tests and cervical cancer screening at partner hospitals and clinics.
Cervical cancer screening does not need to be done too often — but it does need to be done at the right time and regularly.
The information in this article is for reference only and does not replace the advice or instructions of a doctor. The starting age and screening intervals may differ between countries, professional guidelines and each person's individual risk.
Frequently asked questions
At what age should cervical cancer screening begin?
There is no single age that applies worldwide.
According to the American Cancer Society (ACS), people with a cervix who are at average risk should start screening at the age of 25.
Meanwhile, the WHO recommends starting routine HPV DNA screening at the age of 30 for women in general. For women living with HIV, the WHO recommends starting at 25.
The starting age can therefore vary depending on the country, the screening programme and individual risk.
Do you need a Pap smear every year?
No.
Annual cervical screening is usually unnecessary for people at average risk whose previous results were normal.
The interval depends on the type of test used.
If you have had the HPV vaccine, do you still need screening?
Yes.
The HPV vaccine substantially reduces the risk of infection with the most important cancer-causing HPV types, but it does not protect against all high-risk HPV types.
People who have been vaccinated should still be screened according to an appropriate schedule.
References
- World Health Organization – WHO Guideline for Screening and Treatment of Cervical Pre-cancer Lesions
- American Cancer Society – Cervical Cancer Screening Guidelines
- American Cancer Society – Screening Recommendations by Age
- CDC – Screening for Cervical Cancer
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