Colon Cancer Symptoms You Might Be Ignoring

Most people don’t miss colon cancer symptoms because they don’t care. They miss them because many signs can sometimes be easy to explain.

A little blood? “Probably hemorrhoids.” An odd week in the bathroom? “Must be stress.” Tired all the time? “Life.”

Evan K. Fitz, MD, an Indianapolis colon and rectal surgeon with Franciscan Physician Network Indiana Colon & Rectal Specialists, hears this often from patients: “I thought it would pass.” Sometimes it does. But a helpful rule of thumb is simple, he said: “Pay attention to what’s new for you, and what doesn’t go away. If something feels different from your baseline and it keeps happening, talk with your provider.”

Remember, at 45, you can feel well and still have colon polyps. That is why guidelines recommend colon cancer screening tests begin at age 45 for most adults. Dr. Fitz shares common symptoms of colon cancer that can easily be missed.

Key Takeaways: Colon Cancer Symptoms You Might Miss

• Early colon cancer symptoms can blend in with common gut issues, so many people wait longer than they should.
• A new symptom that stays or returns needs a healthcare visit, even if you feel mostly fine.
• A short symptom log that tracks changes in bowel habits, when they started and what shows up, can help your care team choose the right plan.
• A colonoscopy at age 45 can find and remove polyps to help prevent colon cancer.

Persistent Abdominal Pain

Belly pain can come from stress, food, constipation or a short illness, so most people try to wait it out. That makes sense. Still, pain that keeps coming back or doesn’t resolve should be checked, especially if anything else feels off.

Dr. Fitz said, “You might notice cramps or pressure that returns, bloating or fullness that doesn’t match what you ate or pain that stays after a bowel movement.” It’s important to note where the pain is, how long it lasts and whether bowel habits change at the same time.

Blood In The Stool Or Rectal Bleeding

Blood in the stool can feel scary or awkward, so many people stay quiet and hope it goes away. Others might assume it’s a hemorrhoid and try to wait it out. That guess makes sense, but it can delay care, said Dr. Fitz. He often sees patients who waited because they felt sure a simple reason explained the change. “Bleeding is one of the symptoms that deserves a real evaluation rather than a guess,” he said.

You may notice bright red blood on toilet paper, blood in the toilet bowl, stool that looks very dark or mucus in the stool. Bleeding can have more than one cause, and many are treatable. The key is to find the cause sooner rather than later.

Dr. Fitz recommends that you see your provider if rectal bleeding happens more than once, or if it shows up with abdominal pain, fatigue or a change in bowel habits. If the bleeding feels heavy or you feel faint or weak, you should seek urgent care.

Changes In Bowel Habits

Travel, new medications, dehydration, stress and short illnesses can all affect your bowel habits, so it’s normal to have an off week now and then. The key question is this: Does it return to your normal? If your “new normal” sticks around, that matters.

A change in bowel habits can look like:

• A “not empty” sense after you go
• A sudden, urgent need to go to the bathroom
• New constipation that lasts
• New diarrhea that keeps coming back
• Stool that stays narrow for weeks

“A practical rule is if a change lasts more than two weeks, schedule a visit,” Dr. Fitz said. To make that visit more useful, try a simple 7–14 day symptom log. You don’t need a perfect journal, but a few bullets each day to track bowel and abdominal symptoms works.

Track what you notice:

• How often you go(and whether the schedule changes, like if you wake up in the night to go)
• What the stool looks like(watery, hard pellets, thin or unusually loose)
• Any blood or mucus
• Any abdominal pain(where it sits and whether it comes before or after a bowel movement)
• Any triggers(new meds, antibiotics, iron supplements, recent travel, diet changes)

Two signs people often miss: a strong new urgency, where you have to go right away but not much comes out, and a “not empty” feeling that sticks around after you finish.

If you feel unsure about what counts as “lasting,” here’s a simple way Dr. Fitz tells his patients to think about it: one odd day can happen, a rough week can happen, but a pattern that does not resolve deserves medical advice.

Unexplained Weight Loss Or Fatigue

Weight loss can feel easy to dismiss, especially if life has been stressful or your appetite has changed. But if the scale drops and you haven’t changed your diet or activity, it’s worth a check, especially if it happens with other symptoms.

Low energy can also feel easy to accept, especially if you’ve been busier than normal. If fatigue doesn’t get better or changes what you can do in a day, that matters. Some people also learn they have low iron. “I don’t want patients to accept ongoing fatigue as ‘just life’ without looking for a cause,” Dr. Fitz said.

To make your appointment more productive, bring some details with you that you’ve been tracking:

• How much weight you lost and over what time
• What low energy feels like day to day (sleepy, weak, short of breath, wiped out)
• Any other changes happening at the same time (bowel habits, abdominal pain, rectal bleeding)
• A new medication or supplement, recent illness or major diet change

Colonoscopy At 45

Even if you feel fine, a colonoscopy is still an important preventive screening. That’s why the U.S. Preventive Services Task Force and the American Cancer Society recommend regular colorectal cancer screening for average-risk adults begin at age 45.

A colonoscopy stands out because it can do more than “look.” Your doctor can find colon polyps and remove them during the exam, which helps stop cancer before it starts. And because polyps often cause no symptoms, screening matters even when nothing feels wrong. If your colonoscopy result looks normal, many people can wait 10 years before the next one. Your schedule depends on what your doctor finds and your personal risk.

You may also hear about a newer blood test option. Blood tests can detect many cancers but often miss advanced polyps, while colonoscopy finds more of the polyps that matter for prevention (and can remove them during the colonoscopy). And if a blood test comes back abnormal, you still need a colonoscopy to confirm the result and address the cause.

When To Seek Medical Care

Not every symptom means you have colon cancer. In fact, many people who get evaluated learn they have a noncancerous and treatable condition. The bigger risk is waiting so long that you miss the chance to address the cause early.

Don't wait, prioritize your health. Find the right Franciscan Health doctor for your needs, and request an appointment today.