Your screening checklist by age

This table is a starting point for people at average risk. Prior diagnoses, family history, inherited cancer risk, or other conditions can change your schedule. Cholesterol and other cardiovascular checks also belong in a personal prevention plan; see our heart-health guide and ask your clinician what applies to you.

The USPSTF recommends colorectal screening from age 45 for adults at average risk. It recommends mammograms every two years from 40 through 74. If you are nearing either birthday, ask what to book and whether your personal risk calls for an earlier or different plan. You do not need to wait for a symptom to begin recommended screening.

In your 20s

Ask about cervical screening and blood pressure, and tell a clinician about any personal or family history that may change your plan. The USPSTF cervical recommendation applies to asymptomatic people with a cervix; previous high-grade cervical lesions, cervical cancer, certain exposures or a compromised immune system may require different follow-up. HPV vaccination is valuable prevention, but it does not automatically eliminate the need for recommended screening.

Keep a record of the test you had, its date and any follow-up instructions. A Pap test and an HPV test look for different things, and the recommended interval depends on the test and result. If you aren't sure which one you had, your clinician can help retrieve the record.

In your 30s

Cervical screening options change under the USPSTF recommendation. Ask which options are available to you and what the next date should be. Continue to discuss blood pressure and cardiovascular risk, including cholesterol when appropriate for your circumstances. Pregnancy history, family history and other conditions may affect the advice you receive.

If a previous result was abnormal, follow the individualized plan you were given rather than assuming the standard interval applies. A screening schedule is only one part of care; follow-up after an abnormal result is equally important.

In your 40s and beyond

The USPSTF recommends biennial breast screening from age 40 and colorectal screening beginning at 45 for average-risk adults. Ask how to schedule each test, what preparation is needed and when to expect results. The recommendation for adults 76 to 85 is individualized; your clinician can discuss your health, screening history and preferences.

Other organizations differ on breast-screening intervals and start ages. You can ask why a clinician recommends a particular schedule and what benefits, false positives and follow-up procedures may involve for you.

Colonoscopy or a stool test?

A colonoscopy lets a clinician inspect the colon and remove some precancerous polyps. A stool test can be done at home, but you need to repeat it on its recommended schedule. A positive stool-based test requires a follow-up colonoscopy. Discuss the options, practical barriers and your risk with a clinician; a test you complete on schedule is more useful than a plan that stays on your to-do list.

A screening result is not always a diagnosis. A positive or abnormal result means you may need another test to clarify what caused it. Ask who will contact you, when to expect an answer, and what to do if you haven't heard back. Don't assume that no news means the result is normal.

A normal result is reassuring but does not guarantee that a future symptom is harmless. Save your report and the date of your next recommended test. If getting to an appointment is difficult, ask the clinic about scheduling, language access, transportation, cost or alternatives. The most useful plan is one you can actually complete and follow up.

What questions should you ask about a stool test?

Ask which test you are being offered, how to collect and return the sample, how often it should be repeated, and what a positive result means. A positive result requires a follow-up colonoscopy; discuss the expected timing and coverage with your clinician. A stool test is an option for many average-risk people, but it is not the right choice in every clinical situation.

What should you know before a mammogram?

Ask the imaging center how to prepare and how you will receive the result. If you need additional images, ask what happens next rather than assuming that a callback means cancer. If you notice a new breast change, mention it when booking; you may need a diagnostic evaluation rather than a routine screening appointment.

Symptoms that should not wait

Make a medical appointment if you notice rectal bleeding, a lasting change in bowel habits, unexplained weight loss or persistent abdominal pain. A new breast lump or another new breast change also needs evaluation. These signs do not automatically mean cancer. They do mean you should ask a clinician about them rather than wait for the next routine screen.

Tell your clinician about close relatives with colorectal or breast cancer, known inherited cancer risk, inflammatory bowel disease, previous chest radiation or a personal cancer history. Average-risk screening tables may not fit you. Dense breasts are also worth discussing: the USPSTF says evidence is insufficient to recommend for or against supplemental ultrasound or MRI solely on the basis of breast density after an otherwise negative mammogram.

Screening is one part of preventive care. Discuss blood pressure, cholesterol and other cardiovascular risk factors with a clinician, along with any vaccines or other care relevant to your age and history. There is no need to memorize every interval: a written plan with the next due date and the name of the test is more useful.

Family history can be hard to gather. If possible, note which relatives had cancer or heart disease, their approximate age at diagnosis and any known inherited condition. If you don't know your family history, say so; not knowing does not mean you cannot receive preventive care.

Lifestyle choices can support overall health, but they do not guarantee that cancer or another illness will be prevented. Discuss movement, food, alcohol and tobacco in a way that fits your health and resources. A missed test is a reason to ask for help getting back on track, not a moral failure.

Check which screenings are due, choose a test you can complete, and ask your clinician to confirm the schedule. Keep a record of your results and any recommended follow-up. A missed screening is a reason to book a visit, not a reason to feel ashamed.

At what age should I start colorectal cancer screening?

For adults at average risk, the USPSTF recommends starting at 45 and continuing through 75. A family or medical history may change that plan.

Can I use a stool test instead of a colonoscopy?

For many average-risk adults, yes. Different tests have different intervals, and a positive stool test must be followed by colonoscopy. Ask your clinician which option fits you.

When should I start mammograms?

The USPSTF recommends a mammogram every two years from 40 through 74 for women at average risk. Other organizations differ, so discuss your individual schedule.

How often do I need a Pap or HPV test?

The current USPSTF recommendation is a Pap test every three years from 21 to 29. From 30 to 65, options include Pap every three years, high-risk HPV testing every five years, or both every five years. Its cervical guidance is being updated, so confirm the current recommendation with your clinician.

Does a normal screening mean I should ignore symptoms?

No. Screening is intended for people without symptoms. Contact a clinician about a new or persistent concerning change even if you recently had a normal result.

What if I missed a recommended test?

Contact your clinic and ask how to catch up based on your age, history and previous results. You don't need to feel embarrassed about asking.