Colon cancer is a disease that begins in the rectum or colon. Both organs are in the lower part of your stomach related framework. The colon is otherwise called the digestive organ. The rectum is toward the finish of the colon. Symptoms of Colon cancer are frequent diarrheal or constipation, rectal bleeding, continuous abdominal discomfort like cramps, blotting or pain, unexplained weight loss, fatigue and a feeling that your bowel empty completely.