Symptoms of colon cancer will depend on the location and stage of cancer. Just by knowing symptoms one cant come to diagnose. It is advisable to show to a clinician to avoid confusion and panic. Some of the common symptoms of colon cancer are: A persistent change in your bowel habits, including diarrhea or constipation or a change in the consistency of your stool, Rectal bleeding or blood in stool, Persistent abdominal discomfort, such as cramps, gas or pain., a feeling that bowel doesn't empty completely, weakness or fatigue, unexplained weight loss ,vomiting and others. But these symptoms can be found in other abdominal diseases, and therefore can't be diagnosed. You should consult a Gastroenteritis Treatment doctors in Mumbai, or those based in any other city, on an urgent basis. On examining the patient and after studying the reports of investigation like blood test, colonoscopy, CT, they will be in a position to answer your queries regarding colon cancer. Hope our answer helps you.