As unbelievable as it may sound, constipation comes across as a key sign and symptom of colon cancer. A major challenge with colorectal cancer is that its signs and symptoms only appear at the later stages. Constipation comes across as one of the “less-serious” serious signs. We have all suffered constipation at a point in our lives, so why would we take it seriously? Lack of water, exercise, and foods with lots of fiber bring about constipation, which comes across as modifiable lifestyle factors. However, doctors say that frequent constipation could result from malignant growth that could alter the bowel movements by blocking or narrowing the bowels. A complete blockage leads to bowel obstruction.