Understanding your bowel screening (FIT) test result

The home bowel screening test is a check, not a diagnosis

If you have received a bowel screening kit in the mail, it is there to help find bowel changes early, often before you feel unwell. The National Bowel Cancer Screening Program sends a free at-home test kit to eligible Australians aged 50 to 74 every 2 years.

The test is called a FIT, which stands for faecal immunochemical test. You may also hear older terms such as faecal occult blood test. It checks a small stool sample for tiny amounts of blood that you may not be able to see in the toilet or on the toilet paper.

The kit is done at home. You collect the sample, send it back as instructed, and the result is reported. It is not a camera test and it does not look inside the bowel. It cannot tell you exactly where any blood has come from, and it cannot diagnose cancer by itself.

You do not need to have bowel symptoms to do the test. In fact, that is the reason screening exists. It is meant for people who feel well, because waiting for pain, bleeding you can see, or a major change in bowel habit can mean a problem is found later than it could have been.

That is why the result is best seen as a guide to the next step. A negative result usually means no blood was found in that sample. A positive bowel screening test means blood was found and the bowel should be checked more closely.

A positive FIT test does not mean you have bowel cancer

The most important point is this: a positive FIT test does not mean you have cancer. It means blood was detected in the sample, and that needs a proper explanation.

Blood can come from many causes. Some are common and not cancer, such as haemorrhoids, small tears, inflammation, or small polyps. Polyps are growths on the bowel lining. Many are benign, but some can change over time, which is why finding and removing them matters.

Blood can also come from more serious causes, including bowel cancer. The screening test cannot sort these causes apart. It is designed to raise a flag early, so you and your doctor can act before symptoms become more obvious.

A positive result can feel confronting because it arrives when you may feel completely normal. That does not make the result unreliable, and it also does not make it a diagnosis. It simply means there was enough blood in the sample for the test to pick it up.

It is also worth being careful about self-diagnosis. Rectal bleeding should not simply be put down to haemorrhoids without checking for higher causes, especially if you are aged 45 or over, have anaemia, unexplained weight loss, a change in bowel habit, or a family history of bowel cancer. Those features are reasons to speak with a doctor and organise the right investigation.

Feeling anxious after a positive result is very common. The useful way to think about it is that the test has done its job: it has found something that deserves attention, not given you a diagnosis.

Why colonoscopy is usually the next step

After a positive FIT result, colonoscopy is usually recommended because it lets the specialist see the bowel lining directly. This is the key difference between screening and investigation. The home test detects blood; colonoscopy looks for the reason.

During a colonoscopy, a thin flexible camera is passed through the bowel while you are under sedation or anaesthetic care. The specialist checks the lining of the large bowel and can take samples if needed. If small polyps are found, they can often be removed during the same procedure.

That is one of the main benefits of colonoscopy after a positive bowel screening test. It can help diagnose a problem, but it can also prevent future problems by removing polyps before they have the chance to become cancer.

Colonoscopy is also useful because it checks the whole large bowel, not just one area. If the bowel preparation is clear, the specialist can carefully inspect the lining and record what has been found. This gives you a much clearer answer than repeating the home test and hoping for a different result.

Most people who have a colonoscopy after a positive FIT test do not have bowel cancer. Some have polyps, haemorrhoids, inflammation, or another explanation. Some have no major abnormality found. The point of the test is to make sure, rather than guess.

Dr Goutham Sivasuthan is a Specialist Endoscopic and Minimally Invasive Surgeon based in Brisbane. At Colonoscopy Brisbane, his role is to assess your result, explain your options in plain English, and perform colonoscopy when it is appropriate for you.

What happens after you receive a positive result

The next step is usually to speak with your GP and arrange referral for colonoscopy. Your GP can review your result, check your general health, medicines, and symptoms, and send the referral through to Colonoscopy Brisbane if you choose to be seen privately.

You can also contact Colonoscopy Brisbane directly if you have received a positive result and are unsure where to start. The team can explain what information is needed and whether a GP referral is required for your situation before a procedure is booked.

Private colonoscopy can usually be arranged faster than waiting through the public system after a positive National Bowel Cancer Screening Program result. The exact timing depends on your health, referral details, medicine use, hospital availability, and whether any extra assessment is needed first.

At your assessment, you can expect questions about your bowel pattern, any visible bleeding, abdominal symptoms, past colonoscopy results, family history, and regular medicines. This is not to alarm you. It helps match the procedure plan to your health and makes sure important details are not missed.

Before colonoscopy, you will receive instructions for bowel preparation. This usually means changing your diet for a short time and drinking bowel preparation medicine so the bowel lining can be seen clearly. If you take blood thinners, diabetes medicines, iron tablets, or other regular medicines, you will be told what to do before the procedure.

The preparation is often the part people think about most. You will be given written steps, including when to change what you eat and when to drink the preparation. Following the instructions closely gives the best chance of a clear view during the colonoscopy.

On the day, you should not drive yourself home after sedation or anaesthetic care. Most people plan for someone to collect them and stay nearby afterwards. Your results and next steps are explained after the procedure, with any biopsy or polyp results followed up when they return.

Costs, no-gap options and what to ask before booking

Cost should be clear before you commit to a procedure. Colonoscopy Brisbane offers no-gap options for insured patients and transparent fixed pricing for uninsured patients. The current figures can change, so the cost page is the right place to check the latest details.

When you contact the practice, it helps to have your positive FIT result, Medicare details, private health insurance details if you have them, and any referral information from your GP. The team can then guide you through the usual next steps and explain what applies to your situation.

If you have private health insurance, the practice can explain what information may need to be checked with your fund. If you are uninsured, you can ask for the current fixed price before deciding whether to proceed privately.

If you are unsure whether private colonoscopy is the right choice for you, you can ask about timing, likely out-of-pocket costs, preparation, transport home, and what happens if polyps are found. Clear answers before booking can make the process feel much less overwhelming.

A positive screening test is a prompt to act

Bowel screening is one of the most useful tools we have for finding bowel cancer early or preventing it by finding polyps. It is designed for people who feel well, because early bowel changes often cause no clear symptoms.

A positive FIT test is not a verdict. It is a prompt to organise the next step, get a clear answer, and reduce uncertainty. For many people, the colonoscopy result brings relief. For others, it finds polyps that can be removed, or a problem that can be managed earlier than it otherwise would have been.

If you are helping a partner, parent, or friend with their result, a calm practical approach can help. Keep the letter or result, write down current medicines and health conditions, and help them make the call or GP appointment. The next step is easier when the information is ready.

If you have a positive bowel screening test, do not ignore it and do not assume the cause. Keep the result, speak with your GP, or contact Colonoscopy Brisbane to ask what information is needed to arrange assessment with Dr Goutham Sivasuthan.

Frequently asked questions

Does a positive FIT test mean I have cancer?

No. A positive FIT test means blood was found in your stool sample. Blood can come from haemorrhoids, polyps, inflammation, or other causes, as well as cancer, so colonoscopy is usually needed to find the source.

How soon after a positive result should I have a colonoscopy?

You should follow up a positive result promptly rather than waiting for symptoms. The right timing depends on your health, medicines, referral details, and availability, so speak with your GP or contact Colonoscopy Brisbane to organise the next step.

Can I book a colonoscopy without a GP referral?

You can contact Colonoscopy Brisbane directly after a positive FIT result and ask what information is needed. In many cases a GP referral is still useful because it includes your medical history, medicines, and screening result, and may be needed before booking.

What if I am too embarrassed or scared to follow up?

Many people feel embarrassed or worried after a positive bowel screening test. The team deals with these results every day, and the aim is to make the process clear, respectful, and manageable. It is better to ask questions early than sit with uncertainty.

Is bowel screening free?

The National Bowel Cancer Screening Program sends a free home test kit to eligible Australians. If the result is positive, the follow-up colonoscopy is a separate service, and costs depend on whether you are treated through the public system or privately.

What age does the National Bowel Cancer Screening Program cover?

The National Bowel Cancer Screening Program sends home test kits to eligible Australians aged 50 to 74 every 2 years. If you have bowel symptoms, rectal bleeding, anaemia, unexplained weight loss, a change in bowel habit, or a family history of bowel cancer, speak with a doctor even if you are outside that age range.

Last medically reviewed by Dr Goutham Sivasuthan, FRACS — July 2026. This article is general information and does not replace individual medical advice.