Cases of bowel cancer are rising among young adults, with Gen Z seeing a worrying increase. According to Cancer Research, it’s the UK’s fourth most common cancer, though only one in 20 cases occurs in people under 50. Doctors warn that “54 percent of cases are preventable,” making early awareness crucial.

Dr. Jack Ogden from The Lagom Clinic says, “Awareness of these silent signs can save lives. Paying attention to subtle changes and acting promptly is the best defence against colon cancer.” He highlights five often-overlooked warning signs.

The first is iron deficiency anaemia, which can cause “unexplained fatigue, pale skin or shortness of breath.” Tumours may bleed and interfere with iron absorption, leading to dizziness, heart palpitations, or headaches.

The second is toilet changes such as constipation, diarrhoea, or narrower stools without a clear cause. Thin stools may signal a tumour obstructing the colon.

Third is unexplained weight loss, either sudden or gradual, caused by appetite loss, nutrient absorption issues, or tumour activity.

Fourth is bloating or abdominal discomfort, including persistent cramping or feeling full quickly.

Finally, blood in stool—whether visible or hidden—can point to cancer. Dark stools may suggest bleeding higher in the bowel.