AIIMS, Harvard Gastroenterologist shared 8 signs of colon cancer: blood in stool, unexplained weight loss and more

The colon cancer contributes to one of the most common cancer related deaths globally. This is the second major reason. In the WHO report from July 2023, 1.9 million new cases of colorectal cancer were reported in 2020. This indicates the severity of diseases, which highlights the need for initial identity that can improve survival rates. In an Instagram post shared on 31 August, AIIMS, Harvard and a gastroenterologist and liver specialist trained in Universities. Saurabh Sethi shared the signs, some of which can confuse comparatively as hemorrhoids with a comparatively low-accumulated conditions.

Symptoms of colon cancer

It is important to know the signals because colon cancer can develop quietly. But by being aware of the initial signs, one can seek treatment on time, which can increase the chances of survival. Dr. Sethi listed these warning signals:

1. Blood in Stool: Shiny red or dark, can indicate bleeding in the terry stool colon. Do not assume that this is just bleeding.
2. Constant bowel change: Constipation, diarrhea, or contraction of stool lasting over a few days. This is a red flag.
3. Abdominal pain or cramps: Frequent swelling, cramps or abdominal pain that is new or unexplained is entitled to a check-up.
4. Unexplain weight loss: Losing weight without diet or lifestyle changes can mean that your intestine is not absorbing nutrients properly.
5. Running fatigue: Chronic fatigue, weakness or dizziness can result in slow blood loss and anemia.
6. Uninterrupted iron deficiency anemia: If the labs show low iron, especially in men or women after menopause, this may be an initial hidden signal.
7. Spirit of incomplete empty: If it seems that you cannot ‘finish’ after the bowel movement, it can point to the blockage or the development of the tumor.
8. Family History: Being close relatives with colon cancer increases your risk; Do not delay screening if symptoms appear.

Dr. Sethi mentioned that most colon cancer starts quietly, but when it is revealed early, the survival rate of five years is up to 90 percent higher. This is why he urged not to ignore the warnings and delay the screening. Colonoscopy can save life.

What to eat to reduce risk?

Lifestyle habits, including dietary options, also have most prevention. In a webmD report from June 2025 for colorectal cancer, a broad term that includes cancer of both colon and rectum, adopting whole grains such as oatmeal, whole wheat bread and brown rice, as they help in bowel movement. Similarly, the diet includes beans, peas and lentils, as they are legumes rich in fiber and protein, and flavonoids. Colorful vegetables such as broccoli, cabbage, and oranges (rich in vitamin C) contain phytochemicals that prevent the growth of cancer cells. Omega -3 fatty acids are another nutrient that is good in the diet, found in sources such as salmon.

Note the readers: This article is only for informative purposes and is not an option for professional medical advice. Always consult your doctor with any question about a medical condition.