GP Warns of Key Bowel Cancer Symptoms That Can Be Mistaken for IBS

General practitioners are warning that certain bowel symptoms, often dismissed as Irritable Bowel Syndrome (IBS), could be indicative of bowel cancer, especially in individuals under 50. The condition, which affects about a fifth of adults, can present with a range of digestive issues that can mimic less severe ailments.

Dr. Asiya Maula, a GP at The Health Suite, points to the persistent sensation of incomplete bowel movements as a significant, often overlooked, warning sign. This feeling, medically known as incomplete bowel emptying, can occur when a growth in the bowel or rectum obstructs the passage of stool, leading to a feeling of pressure or the need to defecate even after using the toilet. While not exclusively a symptom of cancer, its persistence warrants medical attention.

Another potential indicator is the presence of gut problems alongside exhaustion and breathlessness. These symptoms can signal anemia, a condition where the blood cannot carry sufficient oxygen, leading to fatigue. Anemia can develop as a result of blood loss, which may be triggered by a tumor. Dr. Maula also cautions against dismissing blood in the stool, a common sign of bowel cancer, as merely a result of hemorrhoids, a tendency she notes is prevalent among younger individuals.

"Do not simply write it off because you are in your twenties, thirties or forties," she urges. "There is a tendency among younger people to wait and see if symptoms disappear, particularly when they are busy or think there is an obvious explanation. Your GP would much rather investigate a symptom that turns out to be harmless than have someone delay seeking help because they thought they were too young to have bowel cancer."

These warnings come amid a notable increase in bowel cancer diagnoses among those under 50. Cases in this age group have risen by more than 50 percent over the last two decades. This trend echoes concerns raised by other medical professionals, including Dr. Jack Ogden, a GP from Bristol, who previously highlighted less common symptoms such as "pencil thin" stools, which can indicate a tumor obstructing the colon. Gradual, subtle weight loss without changes in diet or exercise is another telltale sign, often caused by increased metabolic demand, loss of appetite, or nutrient absorption issues related to tumors.

Alarmingly, a recent U.S. study indicated a surge in diagnoses among teenagers, with individuals aged 21 and under experiencing particularly aggressive forms of the disease. The study found that among this young cohort, 45 percent died and 37 percent experienced cancer recurrence within a year. Early symptoms reported by these patients included back or abdominal pain (a third of cases) and changes in bowel habits (nearly half).

Experts have cited factors such as poor diets, sedentary lifestyles, and rising obesity rates for the increase in diagnoses. However, Dr. Maula advises against definitively attributing the rise to any single cause, emphasizing that research into the underlying factors is ongoing. Cancer Research UK has launched a large-scale study, PROSPECT-UK, to investigate potential causes, aiming to recruit 250,000 adults to examine the roles of diet, lifestyle, gut health, and environmental exposures in the increasing rates of bowel cancer among younger populations. The story of Dame Deborah James, who died in 2022 at age 40 after her bowel cancer diagnosis was delayed for nearly a year due to initial misdiagnoses of IBS or colitis, has also amplified awareness of the disease.