Doctors are raising urgent concerns as bowel cancer cases rise among Gen Z, with experts warning that many early symptoms can appear without pain, making them easy to ignore. Dr Jake Ogden has highlighted five “silent” warning signs that young adults should not overlook. One of the most common is iron deficiency anaemia, which may cause fatigue, pale skin, dizziness, or shortness of breath due to hidden bleeding from tumours. Changes in bowel habits—such as constipation, diarrhoea, or suddenly thinner stools—can also signal a blockage in the colon. Unexplained weight loss, even if gradual, may result from the body working harder to fight disease or from reduced nutrient absorption. Persistent bloating, cramping, or feeling full quickly after meals can also indicate underlying bowel issues.

Another key symptom is blood in the stool, which may appear dark, black, or hidden from view and only detectable through medical testing. While bright red blood is often linked to haemorrhoids, darker blood may point to bleeding higher in the bowel. Dr Ogden stresses that awareness of these subtle signs can save lives, especially since over half of bowel cancer cases are preventable with early detection. Paying attention to small changes and seeking medical advice promptly remains the best defense against this growing health concern.