Over 80% of Delhi Residents Unaware That Blood in Stool Is a Warning Sign of Colorectal Cancer: Survey

New Delhi, Reporter, Sachin Koli :- Digestive health concerns are rising across India, driven by fast-paced lifestyles, unhealthy dietary habits, and sedentary work routines. Despite the growing prevalence of digestive problems, awareness about serious gastrointestinal diseases such as colorectal cancer remains low. To better understand how people interpret digestive symptoms and when they seek medical help, Merck Specialities Pvt. Ltd. supported a nationwide perception audit through the Lifestyle & Digestive Health Awareness Survey. The survey assessed how individuals respond to symptoms such as irregular bowel movements, acidity, and blood in stool, while also identifying awareness gaps and behavioural patterns that may delay timely medical consultation and diagnosis. 
Consultant Medical Oncology, Sir Ganga Ram Hospital, Delhi, who emphasised the urgent need for greater awareness and timely medical consultation for digestive health symptoms. Colorectal cancer is emerging as a growing health concern in India, driven by unhealthy diets, obesity, and low awareness about gut health. Although largely preventable and treatable when detected early, many cases are diagnosed late due to delayed screening and poor awareness of symptoms. March is observed globally as Colorectal Cancer Awareness Month, and against this backdrop, the nationwide survey uncovered worrying trends in digestive health awareness and lifestyle habits.
The nationwide survey collected responses from 10,198 individuals aged between 25 and 65 years across 14 major Indian cities, including Kolkata, Ahmedabad, Bangalore, Calicut, Chandigarh, Chennai, Delhi, Hyderabad, Indore, Jaipur, Kochi, Lucknow, Mumbai, and Pune. The findings reveal several concerning patterns in digestive health behaviour and awareness. Over 80% of respondents self-medicate for digestive issues such as acidity, indigestion, or constipation instead of consulting a doctor. More than 65% of respondents reported experiencing irregular bowel movements. Over 50% consume outside or packaged food at least three times a week, with 28.1% eating outside almost daily. Only 45.2% reported exercising regularly, while 54.8% said they do not exercise at least three times a week. 39.9% reported tobacco consumption, which is a known risk factor for gastrointestinal diseases. 40% of young respondents ignored symptoms and reported digestive irregularities but did not consult a doctor, assuming it was due to lifestyle habits. Most importantly, over 80% of respondents were unaware that blood in stool can be an early warning sign of colorectal cancer.
As the campaign gathered momentum across Delhi, the city-specific survey findings exposed a worrying lack of awareness around digestive health and colorectal cancer. The city-specific analysis for Delhi included 679 participants, comprising 341 male and 337 female respondents, across age groups 25–35 (144), 36–45 (298), 46–55 (163), and 55 years and above (74). The findings revealed that over 80% of respondents fail to recognise blood in stool as a warning sign of colorectal cancer, indicating low awareness. Equally concerning is the delay in seeking medical help, with 89.5% of respondents opting for over-the-counter solutions or lifestyle changes if their bowel habits changed for a few weeks (constipation or loose motions), while only 10.5% would consult a doctor. Digestive symptoms were widely reported in the city, with more than 65% of respondents experiencing irregular bowel movements and over 80% reporting a sensation of incomplete bowel evacuation at times, which often remains unaddressed. Lifestyle risks were also evident, with over 86% frequently consuming outside or packaged food, while only 35.5% reported exercising regularly, indicating a lack of consistent physical activity.

Tobacco consumption continues to be a concern, with 39.2% of respondents reporting tobacco use. Another major issue is self-management of symptoms, with 89.9% managing gastric issues through self-medication or home remedies for problems such as acidity, gas, or indigestion, while only 10% seek medical advice. When it comes to more serious symptoms, around 40% admitted they would consider self-medication even in cases of blood in stool, reflecting a concerning gap in urgency despite a potentially serious warning sign. Barriers to seeking medical care were also highlighted, with lack of time being the leading reason (35.4%), followed by fear (31.1%) and embarrassment (17.9%), while 15.7% did not consider the issue serious, showing that hesitation often delays care. Awareness levels remain low, with 80% unaware that serious digestive diseases can exist without pain, increasing the risk of delayed diagnosis. Family history was reported by 25.1% of respondents, including conditions such as bowel cancer, polyps, or inflammatory diseases like Crohn’s disease, ulcerative colitis, and celiac disease. Despite this, hereditary risk continues to remain under-recognised and under-discussed.
Dr. Manish Singhal  said, “Colorectal cancer develops in the colon or rectum and often begins as small growths called polyps that can gradually become cancerous if untreated. Risk factors include unhealthy diets low in fibre, obesity, sedentary lifestyles, tobacco use, and age. Don’t miss symptoms such as persistent bowel habit changes, blood in stool, abdominal discomfort, fatigue, or unexplained weight loss. Colorectal cancer is highly treatable when detected early through screening methods such as colonoscopy.”
Dr. Aditya Sarin, Consultant Medical Oncology,  highlighted that lifestyle habits play a major role in the rising incidence of colorectal cancer. He said, “Frequent consumption of processed or outside food, lack of physical activity, tobacco use, and obesity can increase the risk. Adopting healthier habits such as a fibre-rich diet, regular exercise, avoiding tobacco, and undergoing routine screening can  reduce the risk of colorectal cancer and improve overall digestive health.”