Bowel cancer: awareness, screening and prevention

What bowel cancer is

Bowel cancer develops in the large bowel, which is the last part of the digestive system. Most bowel cancers begin as small growths called polyps on the inner lining of the bowel. Polyps are common and usually harmless, but over time a small number can turn cancerous. Because this change happens slowly, often over years, there is a valuable chance to find and remove polyps before they become cancer, or to catch cancer at an early, curable stage. Bowel cancer becomes more common with age and is most often diagnosed in older adults. Understanding how it develops explains why screening and early detection are so powerful in reducing deaths from the disease.

Warning signs to watch for

It is important to know the symptoms, even though many are common and often caused by less serious problems. The main warning signs are a persistent change in your normal bowel habits, such as going more often or looser stools; blood in your poo or bleeding from the back passage; tummy pain, bloating or discomfort, especially after eating; and unexplained weight loss or tiredness, which can be caused by anaemia. Symptoms that last three weeks or more should be checked. Most people with these symptoms will not have cancer, but it is always better to get them looked at. Do not feel embarrassed — GPs deal with these concerns every day, and early checking can be lifesaving.

NHS bowel cancer screening

The NHS offers bowel cancer screening to help find cancer early, often before any symptoms appear. Eligible adults within a certain age range are automatically sent a home test kit through the post every two years, and the age range is being gradually widened. The test is called the FIT, or faecal immunochemical test. It is simple and private: you use a small stick to collect a tiny sample of your poo and post it back in the sealed container provided. The test checks for tiny amounts of hidden blood that you cannot see. If blood is found, you are offered further tests, usually a camera examination of the bowel called a colonoscopy, to find the cause.

Why taking the test matters

Screening saves lives because it can catch bowel cancer at an early stage, when treatment is more likely to be successful, and it can also find polyps that can be removed before they ever turn into cancer. The home test is quick, free and can be done in private, yet many kits are never returned, often through embarrassment or simply forgetting. If you receive a kit, doing it and posting it back promptly is one of the most valuable things you can do for your health. A normal result is reassuring, and you will be sent another kit in due course. If you lose your kit or have questions, you can contact the screening helpline for help.

Lowering your risk

While not all bowel cancer can be prevented, healthy habits noticeably reduce the risk. Eating plenty of fibre from wholegrains, fruit, vegetables and pulses supports bowel health, while cutting down on red and processed meat is recommended. Keeping a healthy weight, staying physically active, not smoking and reducing alcohol all help. A family history of bowel cancer or conditions such as inflammatory bowel disease can raise risk, so tell your GP if these apply, as extra monitoring may be advised. Above all, do not ignore symptoms and do take part in screening when invited. Combining a healthy lifestyle, awareness of the warning signs and regular screening gives you the best protection against bowel cancer.