Preventive Care: The Health Screenings You Shouldn’t Ignore
Most of us are pretty good at going to the doctor when something feels wrong.
Your throat hurts.
You injure your ankle.
You've had a cough for two weeks.
Something hurts, so you make an appointment.
But some of the most important healthcare happens before you feel sick at all.
That's the idea behind preventive care.
Preventive care includes screenings, vaccines, counseling, and other healthcare services designed to identify certain health problems early—or sometimes prevent them from developing in the first place.
And here's the part people sometimes forget:
Feeling healthy doesn't necessarily mean every health measurement is normal.
High blood pressure, high blood sugar, some cancers, osteoporosis, and certain infections can exist for a long time without causing obvious symptoms.
That is exactly why evidence-based screening recommendations exist.
So... What Actually Counts as Preventive Care?
Preventive healthcare can include things like:
Blood-pressure checks
Cancer screenings
Vaccinations
Diabetes screening
Cholesterol and cardiovascular-risk assessment
Testing for certain infections
Bone-density screening
Mental-health screening
Counseling about tobacco use, alcohol, nutrition, physical activity, and other health behaviors
But preventive care is not one-size-fits-all.
Your recommended screenings can depend on:
Your age
Sex and anatomy
Family history
Pregnancy status
Medications
Smoking history
Sexual history
Previous test results
Medical conditions
Personal risk factors
So while articles like this can help you understand common recommendations, your individual preventive-care plan may look different.
Your Blood Pressure Matters Even If You Feel Completely Fine
High blood pressure is a perfect example of why preventive screening matters.
Hypertension frequently does not cause noticeable symptoms, yet over time it can increase the risk of conditions such as stroke, heart disease, heart failure, and kidney disease.
The U.S. Preventive Services Task Force (USPSTF) recommends blood-pressure screening for all adults age 18 and older.
It also recommends confirming a new diagnosis with measurements taken outside of the medical office before treatment is started, when appropriate.
Read the USPSTF blood-pressure screening recommendation
The recommendation is supported by evidence showing substantial overall benefit from screening adults for hypertension.
This is also why:
“But I feel fine” isn't a reliable way to know your blood pressure.
You usually can't feel whether your blood pressure is mildly or moderately elevated.
You have to measure it.
Cancer Screening Isn't Only for People With Symptoms
Cancer screening is specifically designed to look for cancer—or precancerous changes—in people who do not currently have symptoms suggesting that cancer is present.
Different cancers have completely different screening recommendations.
And no, there isn't one magical “full-body cancer test” everyone needs every year.
Breast Cancer Screening
For women and other people assigned female at birth who are at average risk for breast cancer, the USPSTF currently recommends mammography every two years from ages 40 through 74.
Read the 2024 USPSTF breast-cancer screening recommendation
The recommendation does not mean everyone has exactly the same breast-cancer risk.
People with certain genetic mutations, a strong family history, previous high-risk breast findings, or other risk factors may need a different screening strategy.
That's why knowing your family history matters.
Colorectal Cancer Screening
You also don't have to wait until you're 50 anymore.
For adults at average risk, the USPSTF recommends beginning colorectal-cancer screening at age 45 and continuing routinely through age 75.
For adults ages 76–85, the decision becomes more individualized based on factors such as previous screening, overall health, and personal preferences.
See the USPSTF colorectal-cancer screening recommendations
And colonoscopy isn't the only option.
Depending on the situation, recommended screening strategies can include:
FIT stool testing
Stool DNA-FIT testing
Colonoscopy
CT colonography
Flexible sigmoidoscopy
The appropriate interval depends on which test is used.
Compare the recommended colorectal screening options
The important part is not assuming:
“I don't have stomach pain, so I don't need to think about colon cancer.”
Screening is meant to happen before symptoms develop.
Don't Forget Cervical-Cancer Screening
Cervical-cancer screening is another major preventive service.
And cervical screening recommendations have actually been evolving as HPV testing has improved.
Updated 2026 guidance endorsed by the American College of Obstetricians and Gynecologists recommends that average-risk individuals:
Ages 21–29: receive cervical cytology, commonly called a Pap test, every three years
Ages 30–65: generally use high-risk HPV testing every five years as the preferred strategy, with other approved screening approaches available depending on circumstances and preference
Read ACOG's 2026 cervical-cancer screening guidance
New federal women's preventive-services guidelines also include an option for certain patients ages 30–65 to use self-collected samples for high-risk HPV testing, with the updated federal coverage guideline taking effect for most health plans beginning in 2027.
Read the updated HRSA cervical-screening guidance
People with a history of cervical cancer, high-grade precancerous lesions, immune-system conditions, or certain other risk factors may need a different schedule.
The biggest takeaway:
Don't assume a Pap test is something you only need when you're having symptoms.
Cervical screening is preventive care.
Lung-Cancer Screening Is Different
This is a good example of why more screening isn't automatically better.
Lung-cancer screening is not recommended for every adult.
The USPSTF recommends yearly low-dose CT scans for adults ages 50–80 who:
Have at least a 20 pack-year smoking history, AND
Currently smoke or quit within the past 15 years
Read the USPSTF lung-cancer screening criteria
A pack-year is a way of estimating lifetime cigarette exposure.
For example:
1 pack per day × 20 years = 20 pack-years
or
2 packs per day × 10 years = 20 pack-years
Screening people at lower risk can expose them to unnecessary radiation, false-positive findings, anxiety, and additional procedures without the same expected benefit.
That's why preventive medicine is not:
“Test everyone for everything.”
It's:
“Screen the people most likely to benefit.”
Diabetes Can Develop Before You Notice Anything
Type 2 diabetes can also develop gradually.
Some people may have elevated blood sugar for years before experiencing obvious symptoms.
The USPSTF recommends screening adults ages 35–70 who have overweight or obesity for prediabetes and type 2 diabetes.
Read the USPSTF diabetes-screening recommendation
Common screening tests include:
Hemoglobin A1C
Fasting blood glucose
Oral glucose-tolerance testing
For someone with a normal initial result, the ideal interval isn't known with certainty, although the USPSTF notes that screening about every three years may be a reasonable approach in many cases.
Certain risk factors may lead a healthcare provider to consider screening earlier.
And here's why identifying prediabetes can matter:
Prediabetes isn't just a label.
It can be an opportunity to intervene before type 2 diabetes develops.
Some Infections Should Be Screened for Even Without Symptoms
This surprises a lot of people.
You don't necessarily need to feel sick to have certain infections.
HIV
The USPSTF recommends screening for HIV in adolescents and adults generally between ages 15 and 65, with testing outside that age range when someone has increased risk.
Pregnant patients should also be screened.
Read the USPSTF HIV-screening recommendation
Hepatitis C
The USPSTF recommends hepatitis C screening for adults between ages 18 and 79, including people who do not have symptoms.
Read the USPSTF hepatitis C recommendation
The recommendation was supported by an evidence review concluding that screening adults in this age group has a substantial net benefit.
Many people only need hepatitis C screening once, although people with ongoing risk may need repeat testing.
This is another reason routine preventive care matters:
Some important health conditions don't announce themselves.
Bone Health Is Preventive Health Too
Osteoporosis makes bones weaker and increases the risk of fractures.
And you usually cannot feel your bones becoming less dense.
The updated 2025 USPSTF recommendation advises osteoporosis screening for women age 65 and older.
It also recommends screening postmenopausal women younger than 65 when they have risk factors and are found to have increased fracture risk through a clinical risk-assessment tool.
Read the 2025 USPSTF osteoporosis recommendation
For men, the USPSTF currently says there is not enough evidence to determine the overall balance of benefits and harms of routine osteoporosis screening.
That does not mean men can't develop osteoporosis.
It means the evidence isn't currently strong enough to recommend routine population-wide screening in the same way.
Those are two very different things.
Vaccines Aren't Just for Kids
A lot of people finish childhood vaccines and mentally decide:
“Great. Done with vaccines forever.”
Not exactly.
Vaccination continues throughout adulthood.
The recommended schedule can depend on age, pregnancy, previous vaccinations, occupation, travel, medical conditions, and other risk factors.
Adult vaccines may include protection against illnesses such as:
Influenza
Tetanus, diphtheria, and pertussis
HPV
Hepatitis A
Hepatitis B
Shingles
Pneumococcal disease
RSV
Measles, mumps, and rubella
Varicella
CDC maintains an adult immunization schedule because vaccine recommendations can change as new evidence and vaccines become available.
See the CDC adult immunization schedule
Instead of trying to memorize every vaccine recommendation, ask at your healthcare visits:
“Am I up to date on my vaccines?”
It's an extremely simple question that can prevent a lot of confusion.
Your Family History Is More Important Than You Think
Imagine two 35-year-olds sitting next to each other.
They are the same age.
But one has multiple close relatives who developed colon cancer at unusually young ages.
The other doesn't.
Should their preventive care necessarily look identical?
No.
Family history can influence your risk for conditions including:
Certain cancers
Heart disease
Diabetes
Genetic disorders
High cholesterol
Osteoporosis
And saying:
“Cancer runs in my family”
isn't always enough information.
When possible, know:
Which relative had the condition
What condition they had
Approximately how old they were when diagnosed
A parent diagnosed with colon cancer at 42 can be very different information from a distant relative diagnosed at 85.
You don't need a perfectly documented medical genealogy.
Just know as much as you reasonably can.
More Testing Isn't Always Better
This is one of the most important concepts in preventive medicine.
If screening can find disease early, wouldn't screening for everything, constantly be better?
Not necessarily.
Screening can also cause harm.
Potential downsides can include:
False-positive results
Unnecessary anxiety
Additional imaging or procedures
Complications from follow-up testing
Overdiagnosis
Overtreatment
Exposure to radiation
Discovering abnormalities that never would have caused health problems
This is why screening guidelines specify who should be screened and how often.
Interestingly, research looking at broad “general health checks” has found that simply performing lots of routine screening tests in otherwise unselected adults does not automatically reduce mortality.
A Cochrane systematic review involving more than 250,000 participants found little or no effect of general health checks on overall, cardiovascular, or cancer mortality.
Read the Cochrane systematic review on general health checks
A newer 2026 systematic review reached a similarly nuanced conclusion: general health checks appeared to increase detection of chronic conditions and use of preventive services, but randomized trials generally did not demonstrate clear reductions in mortality or cardiovascular events.
Read the 2026 systematic review
That does not mean preventive care doesn't work.
It means evidence-based preventive care is more sophisticated than:
“Run every test every year just in case.”
Targeted screenings with demonstrated benefit are different from indiscriminate testing.
An Abnormal Screening Result Does Not Automatically Mean You Have a Disease
This is another important distinction.
A screening test is not always a diagnostic test.
Screening identifies people who may need further evaluation.
For example:
An abnormal mammogram doesn't automatically mean breast cancer.
An abnormal Pap or HPV test doesn't automatically mean cervical cancer.
A positive stool test doesn't automatically mean colon cancer.
An elevated office blood-pressure reading doesn't automatically mean someone has chronic hypertension.
Often, an abnormal result means:
“We need more information.”
Follow-up testing is what helps determine what is actually happening.
So don't ignore an abnormal screening result—but don't assume the worst either.
Preventive Care Doesn't Replace Paying Attention to Symptoms
Preventive screening recommendations are generally written for people who do not have symptoms of the condition being screened for.
That distinction matters.
For example, saying:
“I'm only 35, so I don't need a colonoscopy yet”
doesn't make sense if you're having concerning gastrointestinal symptoms that require medical evaluation.
Likewise, a person who recently had a normal mammogram shouldn't ignore a new breast lump simply because their “screening is up to date.”
Screening schedules tell us when to look for disease in people who appear healthy.
Symptoms are different.
New or concerning symptoms should be evaluated based on the symptoms themselves—not according to the date of your next routine screening.
What Should You Ask at Your Next Checkup?
You do not need to memorize every screening guideline.
Instead, try asking:
“Based on my age, medical history, and family history, what preventive screenings am I due for?”
Then ask:
Am I up to date on my vaccines?
When was my last blood-pressure check?
Do I need any blood work?
Am I due for cancer screening?
Do I need STI, HIV, or hepatitis testing?
Does my family history change when I should start screening?
When should I come back?
You can also keep a simple record on your phone with the dates of major screenings and vaccines.
Preventive care becomes much easier when you know what you've already done.
The Bottom Line
Preventive healthcare isn't about looking for something wrong with you.
It's about taking advantage of the fact that some health problems can be prevented, detected earlier, or treated more effectively when they're identified before they become obvious.
That might mean:
checking your blood pressure,
getting a mammogram,
sending in a colorectal screening test,
having a Pap or HPV test,
getting vaccinated,
screening for diabetes,
or simply talking with your healthcare provider about your family history.
But prevention isn't about testing everyone for everything.
The goal is the right care, for the right person, at the right time.
You don't have to wait until you feel sick to take your health seriously.
Sometimes one of the healthiest things you can do is make sure you're up to date while you still feel completely fine.
Sources
U.S. Preventive Services Task Force. (2021). Screening for hypertension in adults: USPSTF reaffirmation recommendation statement. JAMA, 325(16), 1650–1656.
View on PubMed
U.S. Preventive Services Task Force. (2024). Screening for breast cancer: USPSTF recommendation statement. JAMA, 331(22), 1918–1930.
View on PubMed
U.S. Preventive Services Task Force. (2021). Screening for colorectal cancer: USPSTF recommendation statement. JAMA, 325(19), 1965–1977.
View on PubMed
U.S. Preventive Services Task Force. (2025). Screening for osteoporosis to prevent fractures: USPSTF recommendation statement. JAMA, 333(6), 498–508.
View the JAMA article
U.S. Preventive Services Task Force. (2020). Screening for hepatitis C virus infection in adolescents and adults: USPSTF recommendation statement. JAMA, 323(10), 970–975.
View on PubMed
Chou, R., Dana, T., Fu, R., et al. (2020). Screening for hepatitis C virus infection in adolescents and adults: Updated evidence report and systematic review for the U.S. Preventive Services Task Force. JAMA, 323(10), 976–991.
View the systematic review
Krogsbøll, L. T., Jørgensen, K. J., & Gøtzsche, P. C. (2019). General health checks in adults for reducing morbidity and mortality from disease. Cochrane Database of Systematic Reviews.
View on PubMed
American College of Obstetricians and Gynecologists. (2026). Screening for cervical cancer.
View the 2026 ACOG guidance
Centers for Disease Control and Prevention. Adult immunization schedule.
View the current CDC schedule