When to Start Cancer Screenings

Cancer screening is a vital part of preventive healthcare, helping detect cancer early, often before symptoms appear. Early detection can significantly improve treatment outcomes and even save lives. But knowing when to start cancer screenings and which tests to get can feel overwhelming. Guidelines vary depending on your age, sex, family history, and other risk factors.

This guide walks through current screening recommendations from leading authorities, explains what to expect from each test, and covers the newer tools and everyday habits that round out a strong early-detection plan.

Cancer screening guidelines are evidence-based recommendations that outline when and how often people should be screened for specific types of cancer. These guidelines are developed by expert panels who evaluate the latest research to balance the benefits of early detection against the risks of overdiagnosis and unnecessary treatment.

Two leading authorities shape these guidelines. The U.S. Preventive Services Task Force (USPSTF) is an independent panel of experts in disease prevention and evidence-based medicine.¹ The American Cancer Society (ACS) uses a rigorous process of evaluating clinical data and updates its guidelines regularly; its early-detection recommendations were last revised in May 2026.²

Detecting cancer early can significantly improve outcomes. For many cancers, early-stage detection increases the chance of successful treatment and long-term survival. For example, the 5-year relative survival rate for localized breast cancer is 91.7%, compared to 32.6% once the cancer has spread to distant parts of the body.³

Early detection also allows for less aggressive treatment, improves quality of life, and reduces overall healthcare costs. Screening programs are a cornerstone of preventive health, targeting people without symptoms to catch disease before it progresses.⁴

The USPSTF recommends a mammogram every two years for women ages 40 to 74.⁵ The ACS recommends that women ages 40–44 have the option to start annual mammograms, women 45–54 get a mammogram every year, and women 55 and older switch to every two years (or continue yearly), as long as they're in good health with a life expectancy of 10 or more years.² Women at high risk, such as those with a known genetic mutation or strong family history, may need MRI in addition to mammography and they may need to start screening earlier than those at average risk.²

Screening is recommended for adults at average risk of colon cancer from ages 45 to 75, with the decision to continue from 76 to 85 made individually with your provider after considering your overall health and risk factors.⁶ Options include:²

• Stool-based tests: a fecal immunochemical test (FIT) or fecal occult blood test (gFOBT) every year, or a stool DNA test (such as Cologuard) every 3 years

• Visual exams: colonoscopy every 10 years, or CT colonography or flexible sigmoidoscopy every 5 years

• A blood-based screening test, now available as an option (though not currently the preferred choice)

Colonoscopy is considered the gold standard because it can find and remove polyps before they become cancer. If any other test comes back abnormal, it needs to be followed up with a colonoscopy.²

People who are at higher risk for colon cancer, such as those with a family history of colon cancer or those with a known genetic mutation, may need to start screening earlier than those at average risk of colon cancer. Colonoscopy is generally the recommended test of choice for people at increased risk for colon cancer.

Recommendations were recently updated. The ACS now advises people with a cervix begin screening at age 25 (rather than 21) and continue through at least 65.² Test options are:²

• A primary HPV test collected by a provider every 5 years (the preferred option)

• A primary HPV test on an FDA-approved self-collected sample every 3 years

• A co-test (HPV plus Pap) every 5 years

• A Pap test alone every 3 years, if HPV testing isn't available

Some organizations, such as USPSTF and the American College of Obstetricians and Gynecologists (ACOG), still begin screening at 21 with a Pap test, so your provider may tailor the timing to you.⁷ You can generally stop at 65 if your recent results have been normal.²

There's no blanket recommendation to screen. Instead, the ACS advises men to make an informed decision with their provider about the PSA blood test. That conversation should start at age 50 for men at average risk, at 45 for those at higher risk (including African American men and men with a father or brother diagnosed with prostate cancer before 65), and at 40 for those at highest risk.^2,8

Annual screening with a low-dose CT scan is recommended for adults ages 50 to 80 who have a 20 pack-year smoking history and either currently smoke or quit within the past 15 years.⁹ Because most lung cancer is linked to smoking, quitting remains the single best way to lower your risk.²

There's no routine screening test for endometrial cancer, but the ACS recommends that at the time of menopause, all women be told about its risks and symptoms, and report any unexpected vaginal bleeding or spotting to their provider right away.²

Most guidelines are written for people at average risk. If you have a genetic mutation (such as BRCA1/2), a strong family history of cancer, or a personal history of certain conditions, you may be considered high risk. High-risk individuals often need earlier and more frequent screening, or additional tests not recommended for the general population. A cancer risk assessment, sometimes with a genetic counselor, can help determine the right approach.¹⁰

There can be subtle differences between organizations, which reflect different interpretations of the same evidence:^1,2

The takeaway isn't that one is "right." It's that these are starting points to personalize with your provider based on your age, history, and risk.

Screening finds cancer early; healthy habits can help keep it from developing. Both the ACS and cancer specialists point to a consistent set of steps:²

• Stay away from all forms of tobacco, and avoid secondhand smoke

• Get to and stay at a healthy weight

• Move regularly (aim for 150–300 minutes of moderate or 75–150 minutes of vigorous activity per week)

• Eat plenty of fruits, vegetables, and whole grains, and limit red and processed meats, sugary drinks, and highly processed foods

• Limit alcohol, or avoid it altogether

• Know your family history and your personal risk, and keep up with regular checkups

Most early cancers cause no symptoms, which is exactly why screening matters. Still, see your provider promptly if you notice unexplained weight loss, persistent fatigue, unusual bleeding (such as blood in the urine or stool, or bleeding after menopause), a new or changing lump, a cough or hoarseness that won't go away, or a mole that changes in size, shape, or color. These usually have causes other than cancer, but they're worth checking.

Traditional methods like mammography and colonoscopy remain the gold standards, but newer technologies are expanding what's possible. The most talked-about is the multi-cancer early detection (MCED) test, a single blood draw that looks for a DNA signal shared by many cancers, sometimes more than 50, including many that have no recommended screening today.¹¹ Everlywell now offers an MCED test through Caris Detect.

These tests are not yet FDA-approved; they're offered as lab-developed tests and aren't part of routine screening guidelines.¹¹ But the evidence is growing: in 2026, the first randomized controlled trial of an MCED test reported about four times more screen-detected cancers and a greater than 20% reduction in stage IV (advanced) diagnoses when added to standard care, though it did not meet its primary goal or yet prove reduced deaths.¹² For now, MCED tests are meant to add to, not replace, your recommended screenings. Alongside these blood tests, AI-based image analysis and personalized genetic testing are also improving the accuracy and reach of early detection.¹³

Understanding the process can ease anxiety:⁴

• Mammography: a quick, low-dose X-ray of the breast; discomfort is usually brief

• Colonoscopy: a flexible scope examines the colon; the bowel prep the night before is typically the least pleasant part

• Pap/HPV test: a swab collects cells from the cervix; mild cramping may occur

• Low-dose CT: a noninvasive scan that takes just minutes

• PSA test: a simple blood draw

• MCED test: a routine blood draw

Discussing the risks, benefits, and logistics with your provider helps you feel informed and comfortable.

Recent changes include the USPSTF recommending breast screening start at 40 (every two years), colorectal screening starting at 45, and the ACS updating cervical screening to begin at 25 with primary HPV testing preferred and an FDA-approved self-collection option.^1,2,6

A mammogram (breast), a colonoscopy or FIT (colorectal), and a Pap test with HPV testing (cervical).⁴

Basic screenings are population-level tests for common cancers, such as breast, colorectal, and cervical, that follow standardized guidelines.⁴

Expert panels like the USPSTF, ACS, and CDC, based on clinical trials, observational studies, and public health data.^1,2,4

The MCED blood test is one of the newest tools. It's not yet part of routine guidelines but can complement standard screenings for a broader range of cancers.¹¹

Preventive screening is a key part of lifelong health. If you're not sure where to start, talk with your provider or use an online tool to assess your risk. Everlywell offers a range of at-home lab tests to support your wellness journey, including the 360 Full Body Test for a broad view of your health across dozens of biomarkers. For those who want to add a proactive layer of cancer screening, the Caris Detect Multi-Cancer Early Detection Test screens for a signal shared by 50+ cancers from a single blood draw, with genetic counseling to help you understand your results, and the Galleri Cancer Screening Test looks for signals from more than 50 types of cancer while predicting the likely tissue of origin. And a virtual care visit connects you with a licensed provider who can help you build a screening plan that fits your history and goals.