Bowel Cancer in New Zealand: What You Need to Know About Colorectal Health

Despite the numbers, many people still feel unsure about when to act, what to look for, or how to talk about their bowel health. The truth is, colorectal concerns are more common than most people realise, and seeking advice early can make a real difference. 

Common colorectal symptoms to watch for

There’s no one-size-fits-all set of symptoms, but some of the most common signs of colorectal conditions include: 

• Ongoing changes in bowel habits (e.g. constipation or diarrhoea) 

• Blood in the stool 

• Unexplained weight loss 

• Ongoing fatigue or low iron levels 

• Abdominal discomfort, bloating or cramping 

These symptoms don’t always mean cancer. There are a range of colorectal issues such as diverticular disease, inflammatory bowel disease (IBD), haemorrhoids or benign polyps that can cause similar effects. But no matter the cause, persistent symptoms are always worth investigating. 

When to see a specialist

Your GP is a good first point of contact, but if symptoms persist or you have a family history of bowel cancer, seeing a gastroenterologist or colorectal specialist can provide further clarity. Investigations like colonoscopy or imaging can help detect or rule out serious conditions early on, offering peace of mind and guiding any next steps. 

Intus also supports people with ongoing colorectal conditions that may not be cancer-related but still impact everyday life. These include issues like rectal bleeding, prolapse, perianal skin tags, diverticular disease, and haemorrhoids. These are conditions that can affect comfort, confidence, and overall wellbeing. 

Screening saves lives 

New Zealand’s National Bowel Screening Programme currently offers free screening to those aged 58–74, using a simple at-home test. It’s a valuable tool for detecting early changes - often before symptoms appear. 

If you're outside the screening age, have symptoms, or a family history of bowel cancer, a colonoscopy may be recommended. Intus patients can self-refer or speak with their GP to explore their options. You don’t need private insurance, and many people are surprised by how accessible it is. 

Specialist care across the South Island 

The Intus team includes experienced colorectal surgeons and gastroenterologists who work across our Christchurch, Dunedin, Queenstown and Wānaka clinics. We offer discreet, timely care and support for people navigating a range of bowel and digestive health concerns. 

From the first consultation through to investigations and treatment, our team is focused on helping people feel informed, respected and well cared for. If something doesn’t feel right, it’s okay to speak up. Your health, and your peace of mind, are worth it.