Most of us know someone whose cancer was found “too late”. Screening exists to change that. For some cancers, a simple test can find changes years before symptoms appear, when treatment is easier and more likely to work. For cervical and bowel cancer, screening can even prevent cancer by finding and removing changes before they turn cancerous.
Yet screening is easy to put off. Guidelines differ between countries, and it isn’t always clear which tests you need, when, and which you don’t. This National Cancer Awareness Day, observed in India on 7 November, here’s a clear guide to the cancer screening tests that make a difference, based on WHO and national guidelines, with notes for India, the UK and the US.
At a glance
- Screening is for people without symptoms. If you have a symptom, see a doctor now; don’t wait for a screening test.
- Cervical cancer: an HPV test from age 25–30 every 5 years or so is one of the most effective screening tests there is. The WHO recommends HPV testing as the first-choice test.
- Breast cancer: mammograms are typically offered every 2–3 years from age 40–50.
- Bowel (colorectal) cancer: a simple home stool test or colonoscopy, usually from age 45–50.
- Mouth cancer: a quick visual check of the mouth matters most for anyone who uses tobacco, gutka or alcohol.
- Lung and prostate: screening is only for certain groups, after a discussion with your doctor.
- In India, adults aged 30 and over can be screened for oral, breast and cervical cancer at government health centres.
What screening is, and what it isn’t
Screening means testing healthy people who have no symptoms to find cancer early, or to find changes that could become cancer. It’s different from a diagnostic test, which is done when you already have a symptom.
The benefits: finding cancer at an earlier stage, when treatment is simpler and survival is higher, and, for cervical and bowel cancer, preventing cancer altogether.
The trade-offs: no test is perfect. Screening can produce false alarms that lead to anxiety and further tests, occasionally miss a cancer, and sometimes find slow-growing cancers that would never have caused harm (overdiagnosis). That’s why guidelines recommend screening only for the cancers, age groups and intervals where the benefits clearly outweigh the harms, and why “full-body cancer scans” and tumour-marker blood tests aren’t recommended for healthy people.
Why it matters: cancer is a growing problem worldwide. India alone recorded an estimated 1.41 million new cancer cases in 2022, with breast, lip and mouth, and cervical cancer among the most common, and these are three of the cancers that screening can catch early.
Cervical cancer: an HPV test every 5 years or so
Almost all cervical cancers are caused by long-lasting infection with high-risk types of the human papillomavirus (HPV). Screening finds the virus or early cell changes, which can be treated before cancer develops, making this one of the most preventable cancers.
What the guidelines say:
- WHO: an HPV DNA test is the preferred screening test, starting at age 30 and repeated every 5–10 years. Women living with HIV should start at 25 and repeat every 3–5 years. Self-collected samples, which you take yourself, can be used.
- UK (NHS England): HPV screening from age 25 to 64. Since July 2025, people who test HPV-negative are invited every 5 years, instead of every 3 for those aged 25–49.
- India: women aged 30 and over are offered screening, often with visual inspection with acetic acid (VIA), through the national NCD programme at government health centres.
What the test involves: a nurse or doctor takes a small sample of cells from the cervix with a soft brush. It takes a few minutes, and it may be a little uncomfortable but shouldn’t hurt. Where self-sampling is offered, you can take a vaginal swab yourself.
Prevention too: HPV vaccination, ideally for girls aged 9–14, prevents most cervical cancers. Vaccinated women still need screening.
Breast cancer: mammograms from your 40s or 50s
Breast cancer is the most common cancer in women worldwide, and in India it accounts for over a quarter of cancers in women. Survival is much higher when it’s found early.
What the guidelines say:
- US (USPSTF, 2024): a mammogram every two years from age 40 to 74.
- UK (NHS): a mammogram every three years from 50 up to 71; older women can ask to continue.
- India: the national programme offers a clinical breast examination by a trained health worker for women aged 30 and over, with referral for a mammogram or ultrasound if anything is found.
If you’re at higher risk, for example with a strong family history of breast or ovarian cancer or a known BRCA gene change, you may need earlier or more frequent screening, sometimes with MRI. Ask your doctor.
Breast awareness matters at every age. Know how your breasts normally look and feel, and see a doctor promptly about a new lump, thickening, change in shape, skin dimpling, nipple changes or discharge. Most lumps aren’t cancer, but they should always be checked.
Bowel (colorectal) cancer: a home test or colonoscopy from 45–50
Bowel cancer usually starts as small growths called polyps, which can be found and removed before they turn cancerous.
What the guidelines say:
- US (USPSTF, 2021): screen adults from age 45 to 75; for 76–85, decide case by case. Options include a home stool test (FIT) every year, or a colonoscopy every 10 years.
- UK (NHS): a home FIT kit every two years, posted to people from their 50s up to 74. The starting age varies by nation.
- India: bowel cancer is less common than in Western countries but rising, and there’s no national screening programme yet. Ask your doctor about a FIT test or colonoscopy from around 45–50, especially if you have a family history.
What the tests involve: FIT checks a tiny stool sample, collected at home, for hidden blood. If it’s positive, a colonoscopy follows, using a thin camera to look inside the bowel and remove any polyps.
Don’t wait for screening if you notice blood in your stool, a lasting change in bowel habits, unexplained weight loss or tummy pain.
Mouth (oral) cancer: a quick look that can save lives
Mouth cancer is common in South Asia, largely because of smokeless tobacco (gutka, khaini, paan with tobacco), smoking, areca nut and alcohol. In India, lip and mouth cancer is the second most common cancer overall.
Screening is simple: a trained health worker, dentist or doctor looks inside your mouth and feels your neck for lumps. In a large trial in Kerala, regular visual mouth checks cut oral cancer deaths by 34% among people who used tobacco or alcohol.
What the guidelines say:
- India: an oral visual examination for adults aged 30 and over, through the national NCD programme.
- Elsewhere: there’s no routine population programme in the UK or US, but dentists usually check the mouth at check-ups.
See a doctor or dentist about a mouth ulcer that hasn’t healed in three weeks, a white or red patch, a lump, difficulty opening your mouth, or unexplained pain or bleeding. And if you use tobacco in any form, quitting is the single biggest thing you can do to protect yourself.
Lung and prostate cancer: only for some people
Lung cancer: screening with a low-dose CT scan is recommended only for people at high risk because of smoking. In the US, that means adults aged 50–80 who have a 20 pack-year smoking history and still smoke or quit within the past 15 years. (A pack-year is one pack of 20 cigarettes a day for a year.) The NHS is rolling out targeted lung checks for people aged 55–74 who smoke or used to. India doesn’t have a lung screening programme, so if you’re a heavy smoker, ask your doctor whether a scan is right for you. Lung cancer also affects people who have never smoked, and air pollution is one of the risk factors.
Prostate cancer: the PSA blood test can find prostate cancer early, but it also finds many slow-growing cancers that would never cause harm, and it leads to false alarms, biopsies and treatments with side effects such as incontinence and erectile problems. The USPSTF advises that for men aged 55–69, screening should be an individual decision made with a doctor, and it recommends against routine PSA screening from 70. Men with a family history, or of Black African heritage, may benefit from discussing it earlier.
Not recommended for healthy people with no symptoms: full-body scans, tumour-marker blood tests (such as CA-125 or CEA) as a general screen, and ovarian, pancreatic or thyroid cancer screening. These can cause more harm than good when used routinely.
Your screening checklist
Guidelines vary by country and are updated over time, so use this as a starting point for a conversation with your doctor.
| Cancer | Who | Test | How often |
| Cervical | Women from 25–30 to about 65 | HPV test (or VIA where HPV testing isn’t available) | Every 5 years if HPV-negative (WHO: 5–10) |
| Breast | Women from 40–50 to about 71–74 | Mammogram (clinical breast exam in India from 30) | Every 2–3 years |
| Bowel | Adults from 45–50 to 74–75 | Home stool test (FIT) or colonoscopy | FIT every 1–2 years; colonoscopy every 10 years |
| Mouth | Adults 30+, especially tobacco or alcohol users | Visual examination | At health checks, or at least every few years |
| Lung | Heavy current or former smokers, 50–80 | Low-dose CT | Yearly, if eligible |
| Prostate | Men 55–69 | PSA test | Only after discussing benefits and harms |
How to make it happen:
- Ask your doctor which tests suit your age, sex, family history and lifestyle, and when you’re due.
- Tell them about family history: cancer in close relatives, especially at a young age, can mean earlier screening.
- In India, ask at your nearest Ayushman Arogya Mandir or government health centre about screening for adults 30 and over. A government campaign has aimed to screen everyone aged 30 and above for oral, breast and cervical cancer alongside diabetes and blood pressure.
- Put reminders in your calendar for your next due date.
Symptoms never to ignore, at any age and whatever your last screening result: a new lump; unexplained weight loss; a cough or hoarseness lasting more than three weeks; blood in urine, stool or phlegm; bleeding after sex or after menopause; a mouth ulcer that won’t heal; or a mole that changes.
The bottom line
Cancer screening isn’t about testing for everything. It’s about doing the right tests at the right time: an HPV test for cervical cancer, mammograms for breast cancer, a stool test or colonoscopy for bowel cancer, and a mouth check if you use tobacco, plus lung and prostate screening for those who qualify. This National Cancer Awareness Day, check which tests you’re due for, book one, and remind someone you love to do the same. And remember: if you notice a symptom, don’t wait for a screening appointment.
Pro Tip: Add your screening due dates to the GOQii App so you never miss one, and keep up the everyday habits that lower cancer risk: being active, eating well and avoiding tobacco. Your GOQii Personalised Health Coach can help you build them, including support to quit tobacco.
Frequently asked questions
What cancer screening tests should I get?
Most adults should consider cervical screening (women), breast screening (women) and bowel screening, starting at the ages set by their country’s guidelines. People who use tobacco should have regular mouth checks. Lung and prostate screening are only for certain groups after discussing them with a doctor.
At what age should women start cervical cancer screening?
The WHO recommends starting HPV testing at age 30 (age 25 for women living with HIV). The UK starts at 25, and India’s national programme offers screening from 30. If your HPV test is negative, it’s usually repeated every 5 years.
When should I get my first mammogram?
It depends on where you live and your risk. The US recommends a mammogram every two years from age 40, and the UK every three years from 50. Women with a strong family history may need to start earlier, so ask your doctor.
How is bowel cancer screened?
Most programmes use a simple home stool test (FIT) that checks for hidden blood, usually every one to two years from around 45–50. If it’s positive, a colonoscopy follows. A colonoscopy every 10 years is another option.
Who should be screened for oral cancer?
Anyone who uses tobacco in any form, chews areca nut or drinks alcohol regularly should have their mouth checked. In India, adults aged 30 and over can get an oral examination at government health centres.
Should I get a full-body scan or tumour marker test to check for cancer?
No, not if you’re healthy and have no symptoms. These tests aren’t recommended for screening because they often give false alarms and can lead to unnecessary tests and worry.
Does a normal screening result mean I can’t get cancer?
No. Screening lowers risk but isn’t perfect, and cancer can develop between tests. Keep going for screening when invited, and see a doctor about any new or unusual symptoms.
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Disclaimer: The information provided in this blog is for general awareness and educational purposes only. It is not intended to replace professional medical advice, diagnosis, or treatment. Always consult a qualified healthcare provider for personalised medical guidance or concerns related to your health.
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