You might have colon cancer if you experience persistent changes in bowel habits, such as diarrhea or constipation, blood in your stool, abdominal discomfort like cramps or gas, unexplained weight loss, weakness or fatigue, and a feeling that your bowel doesn’t empty completely. However, these symptoms can also indicate other conditions, so it’s essential to consult a healthcare professional for proper diagnosis and treatment. Early detection significantly improves the prognosis of colon cancer.