Medical Oncologist
CION Cancer Clinics
Myth: if you have no symptoms, you do not need colon cancer screening | CION Cancer Clinics
Screening is for people who feel well. Early colon cancer and the polyps it grows from cause no pain, no visible bleeding and no change you would notice, often for years. Waiting for a symptom means waiting for the disease to grow. This page explains why feeling fine is not a reason to skip screening, who it is for, and when a symptom means you need a doctor instead. At CION Cancer Clinics in Hyderabad, our oncologists explain colon cancer in plain words and plan care around you and your family.
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Medically reviewed by Dr. Naresh GunduConsultant Medical Oncologist · MBBS, DNB (Internal Medicine), DM (Medical Oncology, AIIMS) · last reviewed October 2026, next review due October 2027
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The belief, examined
Is screening only for people who have symptoms?
"I feel fine, so there is nothing to look for."
Screening exists for people who feel fine. It looks for polyps, small growths on the bowel lining that cause no symptoms at all, and for cancers so early they have not yet changed anything you would notice. Once a symptom appears, the test is no longer screening. It is investigation.
"If something were wrong, I would know."
The colon is a wide, soft tube with very few pain nerves. A growth can sit on its wall for years, bleeding tiny amounts you cannot see, without pain, without a change in bowel habit, without weight loss. Most early colon cancers are found in people who felt completely well.
"My motions are regular, so my bowel is healthy."
Regular motions tell you the bowel is moving food through. They say nothing about what is growing on the lining. A polyp the size of a grape does not block anything, and a flat early cancer changes neither the shape nor the timing of the stool.
"Screening is for people with cancer in the family."
Most people diagnosed with colon cancer have no relative with the disease. Family history moves screening earlier and makes it more frequent. It does not decide whether you need it at all. Age alone is enough reason.
The short answer
Why does early colon cancer give no warning?
Because of where it starts. Nearly all colon cancers begin as a polyp on the inner lining, and a polyp is tiny, painless and silent. It can take many years to turn into a cancer, and even then the cancer stays small and quiet for a long time before it is large enough to bleed visibly, narrow the bowel or press on anything.
The symptoms come late, not early
Blood you can see, a stool that has changed shape, a pain that will not settle, tiredness from a low haemoglobin (anaemia): these are the signs of a growth that has already been there a while. They are the reason people in Telangana and Andhra so often arrive with a cancer that has grown through the bowel wall. The page on colon cancer symptoms explains each of them, but waiting for them is the whole mistake this page is about.
What screening is actually for
Screening is a test done on a healthy person to catch the polyp before it becomes a cancer, or the cancer before it becomes a symptom. Removing a polyp during a colonoscopy stops that polyp ever becoming cancer. That is why screening does something no symptom-led visit can do: it prevents the disease rather than finding it.
Feeling well is the normal state of someone with an early polyp. It is not evidence that there is none.Not sure whether this applies to you?
Ask an oncologistWho screening is for
Should you be screened if you feel completely well?
Screening is decided by age and risk, never by how you feel. These are the three groups it is built for.
Everyone from the mid-forties
International guidelines now start routine screening in the mid-forties for people with no family history and no symptoms. Indian bodies vary on the exact age, and your doctor will say where you fall. Our page on when to start screening walks through the choice.
Usual options
- A stool test (FIT) repeated regularly
- A colonoscopy repeated at longer intervals
Anyone with a parent, sibling or child who had it
A close relative with colon cancer or large polyps moves your start age earlier and usually means colonoscopy rather than a stool test. You still feel fine. That is the point. See screening with a family history.
People with known higher risk
Long-standing ulcerative colitis or Crohn's disease, previous polyps, or an inherited syndrome such as Lynch syndrome all need a tailored plan that starts young and repeats often. Symptoms play no part in setting that schedule.
If you are in this group and have never been screened, that is the conversation to have first.In practice
What does screening involve when nothing is wrong?
A short conversation first
A doctor asks your age, your family history, any bowel condition and any symptom you may have brushed aside. That decides whether a stool test is enough or whether you should go straight to colonoscopy.
A stool test at home, for most people
The FIT kit is a small tube you fill with a smear of stool at home and return to the laboratory. It looks for blood too faint to see. It is a screening test, not a diagnosis: a positive result means a colonoscopy is needed, not that cancer has been found.
Colonoscopy if the stool test is positive, or straight away for higher risk
A bowel preparation the day before, light sedation, and a thin camera looks at the whole colon. Polyps are removed during the same procedure. CION arranges this at a partner endoscopy unit; the screening colonoscopy page describes the day.
A result, and a date for the next one
A normal result sets a long interval before the next test. Polyps set a shorter one. Either way you leave with a plan rather than a worry.
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Did you know
A colonoscopy that finds and removes a polyp is both the test and the treatment. The person walks out of a screening appointment with the growth that could have become cancer already gone, usually without ever having felt it was there.
Being straight with you
What this page cannot tell you
It cannot tell you which test you should have or when. That depends on your age, your family, your bowel history and what is available near your district, and it is a decision for a doctor who has asked you those questions. It also cannot promise that a normal screen means no cancer. No screening test is perfect, and a negative stool test does not rule out cancer in someone who has symptoms.
Who this page does not apply to
If you already have a symptom, you are not a screening case. Blood in the stool, a bowel habit that has changed for several weeks, unexplained weight loss or a low haemoglobin need a doctor this week and usually a colonoscopy, whatever your age and whatever a stool test says. Read how to think about your symptoms and do not wait for a screening slot. Severe pain with vomiting and a bowel that has stopped working is an emergency department visit today.
Screening is not for everyone, either
Someone very elderly, or living with a serious illness that limits life more than a slow-growing polyp would, may be told honestly that screening will not help them. That is a medical judgement, not neglect. The page on when to stop screening explains how it is made.
Unsure whether you are a screening case or a symptom case? Call the helpline and describe what is happening. Someone will tell you which door to walk through.Questions we are asked
Common questions about screening without symptoms
I have no symptoms and no family history. Do I really need screening?
From the mid-forties, yes. Most people who develop colon cancer have neither a symptom early on nor a relative with the disease. Screening is designed precisely for that person. Your doctor will suggest a stool test or a colonoscopy depending on what is practical for you.
Can a doctor tell from a normal check-up that my bowel is fine?
No. Pressing on the abdomen, a routine blood panel and an ultrasound do not see the inside of the colon. Only a stool test for hidden blood, or a camera test, can pick up a polyp or an early cancer. A clean health-check package is not bowel screening unless it includes one of those.
Is a stool test enough, or should I go straight for a colonoscopy?
For someone at average risk, a regular FIT stool test is a reasonable choice and far easier to repeat. Anyone with a close relative affected, previous polyps or inflammatory bowel disease is usually sent straight to colonoscopy. Compare them on our screening options page.
If my FIT test is positive, does that mean I have cancer?
No. A positive FIT means blood was found and the bowel needs a proper look. Piles, a polyp or a small tear are far more common explanations than cancer. The next step is a colonoscopy, and most people who have one after a positive stool test do not have cancer.
If my FIT test is negative, can I ignore my symptoms?
No. A stool test only detects blood on the day of the sample, and some growths do not bleed. A negative screen in someone with bleeding, a changed bowel habit or weight loss does not rule anything out. Symptoms need a doctor regardless of the result.
My parents are in their sixties and have never been screened. Is it too late?
Not at all. The sixties are among the years when screening finds the most. A first colonoscopy at that age is common and worthwhile. Our page on convincing a parent to screen is written for exactly this conversation.
Does screening cost a lot in Hyderabad?
A stool test is inexpensive and a colonoscopy is a moderate one-off cost, far less than treating a cancer found late. Some health schemes and insurers cover parts of it. The screening cost page gives indicative figures and how to get a written estimate.
Can CION arrange screening for someone who feels well?
Yes. A consultation at a CION centre settles which test suits you, and the stool test or colonoscopy is arranged through a partner diagnostic unit. If polyps are found, the result comes back to the same team to plan what happens next. One call starts it.
Your Specialists
Meet CION's colon cancer specialists. Bring your colonoscopy, scan or biopsy report.
Our surgical and medical oncologists plan colon cancer care together: which operation, whether chemotherapy is needed, and the follow-up that comes after.
Medical Oncologist
Dr. C. Raghavendra Reddy
MBBS(Gold Medal), DNB(General Medicine), DM(Medical Oncology)(Gold Medal)
Medical Oncologist
Dr. Bharati Devi Gorantla
MBBS, MD(General Medicine), DM(Medical Oncology)(Adyar,Chennai), ECMO, MRCP SCE(UK)
Medical Oncologist
Dr. Owais Mohammed
MBBS, MD (General Medicine), DrNB (Medical Oncology), ECMO, MRCP SCE (Medical Oncology) (UK)
Medical Oncologist
Medical Oncologist
Surgical Oncologist
Dr. Muralidhar Muddusetty
MBBS (AIIMS), MS (Surgery) (AIIMS), DNB (Surgical Oncology), MRCS (Edinburgh)
Surgical Oncologist
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Sources
- American Cancer Society — Colorectal Cancer Screening Tests
- National Cancer Institute — Colorectal Cancer Screening
- US Preventive Services Task Force — Recommendation: Colorectal Cancer: Screening
- NHS — Bowel cancer screening
This page is general information, not a prescription. Do not change or stop any treatment based on what you read here. If anything is worrying you, contact your own treating team — or call our helpline and we will help you reach the right specialist.
Keep reading
Related pages
Colon cancer screening: who, when and howThe full picture of tests, ages and intervalsWhy screening works for colon cancerThe polyp-to-cancer story that makes screening worth itMyth: colon cancer only happens to old peopleThe next belief that delays peopleWhy so few Indians get screenedThe real reasons, and what gets past them
Talk to us
Feeling well, but never been screened?
Tell us your age, your family history and any bowel symptom, and we will say honestly whether a stool test or a colonoscopy makes sense for you and arrange it. One helpline serves every CION centre.