The top 5 colorectal cancer questions your patients will ask this month
March is National Colorectal Cancer Awareness Month. In the clinic, that often means more screening conversations, more portal messages, and more hesitations from patients who aren’t sure what they really need. Ahead: 5 questions about colorectal cancer you’re likely to hear; plus streamlined, evidence-based ways to answer them without derailing your clinic flow.
Colorectal cancer used to be a disease most of us associated with older adults. Not anymore.
Since the American Cancer Society began highlighting the steady rise in younger-onset colorectal cancer, and after the US Preventive Services Task Force lowered the recommended starting age for average-risk screening to 45, many of your patients in their 30s and early 40s have been paying attention. [][]
They’re seeing headlines, they’re watching TikToks, and they’re walking into your exam rooms with questions.
“We’ve been observing a rising incidence of early-onset colorectal cancer for some time now, even in other countries across the world. … What’s interesting is that many young patients with colorectal cancer don’t necessarily fit an unhealthy clinical profile. Many are generally healthy and physically active prior to their diagnosis,” medical oncologist Daniel Lin, MD, told Jefferson Health. []
Here are five questions about colorectal cancer you’re likely to field from your patients—and practical ways to answer them in a busy primary care setting.
Related: I was diagnosed with colon cancer in my 30s: Here's how I'm coping today1. ‘I’m 34. Should I be getting screened right now?’
This is often the first—and most anxious—question.
The short answer: Not necessarily. The nuanced answer: It depends on risk.
For average-risk adults, routine screening starts at age 45. But patients under 45 may need earlier screening if they have []:
A family history of colorectal cancer
A personal history of inflammatory bowel disease
A known or suspected hereditary syndrome (eg, Lynch syndrome or familial adenomatous polyposis)
Concerning symptoms (rectal bleeding, iron-deficiency anemia, persistent change in bowel habits, unexplained weight loss) []
One practical script: “The overall risk at your age is still low, but it’s not zero. Let’s look at your personal and family history and decide based on your individual risk.”
That framing validates their concern without over-medicalizing a low-risk 34-year-old with no red flags.
2. ‘Why are rates going up in younger people?’
Patients assume there’s a single, dramatic cause. There isn’t. You can explain that rising early onset colorectal cancer appears multifactorial []:
Obesity and metabolic dysfunction
Sedentary lifestyle
Diet patterns (ultra-processed foods, low fiber)
Microbiome changes
Possibly antibiotic exposure patterns
Environmental factors we don’t fully understand yet
It’s also helpful to contextualize the numbers. While incidence is increasing in younger adults, the absolute risk remains much lower than in older adults.
This is a good moment to pivot toward modifiable risk reduction without sounding alarmist:
Fiber intake
Physical activity
Processed meats
Healthy weight
Alcohol moderation
Patients often leave reassured when they understand that risk is influenced by long-term patterns, not a single recent meal.
3. ‘If I don’t have symptoms, how would I even know?
This question opens the door to one of our biggest educational opportunities. Colorectal cancer can be asymptomatic in early stages, which is why screening exists. []
But younger patients should know red flags []:
Rectal bleeding (not just “probably hemorrhoids”)
Changes in bowel habits
Abdominal pain with systemic symptoms
Unexplained weight loss
The key message: “Most rectal bleeding in young adults is benign—but persistent or unexplained symptoms deserve evaluation.”
That reassurance-with-boundaries approach helps avoid both dismissal and unnecessary colonoscopies.
4. ‘Do I really need a colonoscopy, or can I just do a stool test?’
With the expansion of noninvasive options, patients are more aware of alternatives. You can explain that for average-risk patients 45 and older []:
FIT: Annual
Stool DNA test (e.g., multitarget testing): Every three years
Colonoscopy: Every 10 years
Colonoscopy remains the gold standard because it’s both diagnostic and therapeutic. But stool-based testing is appropriate for many average-risk patients who are reluctant to undergo endoscopy.
A practical primary care framing: “The best screening test is the one that gets done.”
For symptomatic patients or those at higher risk, of course, stool tests are not a substitute for diagnostic colonoscopy—and that distinction is worth stating clearly.
5. ‘Should I be worried about my kids?’
This question usually reflects anxiety more than epidemiology. For children of patients without hereditary syndromes or early onset colorectal cancer in the family, routine screening recommendations don’t change.
But this is an opportunity to:
Encourage awareness of family history
Document cancer diagnoses accurately in the chart
Clarify ages at diagnosis in relatives
Consider a genetics referral when appropriate
If a patient has a first-degree relative who was diagnosed at age 60 or younger (or two or more relatives who were diagnosed at any age), they should generally start screening at age 40, or 10 years before the youngest diagnosis in the family (whichever comes first). []
Patients often relax when they realize there’s a clear, structured plan.
The real subtext: ‘Am I safe?’
Many of these questions aren’t about colonoscopy intervals; they’re about uncertainty. Younger adults are watching peers get diagnosed and thinking, This could be me.
In primary care, your role isn’t just to quote guidelines—it’s to:
Stratify risk clearly
Avoid dismissing symptoms based on age alone
Normalize appropriate screening
Keep perspective on absolute risk
Reduce panic while preserving vigilance
The rise in younger-onset colorectal cancer is real. But so is the power of systematic screening and early detection.
When patients leave your office feeling heard—and with a concrete plan—you’ve already lowered one of their biggest risk factors: unmanaged fear. And at this moment, that may matter more than ever.
Related: The common thread behind two major Hollywood deaths—and the important clinical conversations it may trigger