Signs and Symptoms

Colorectal cancer is a silent disease — in the early stages, there are no symptoms. That is why screening is important. As the cancer progresses, the symptoms may include: • A change in bowel habits • Blood in the stool — may be bright red or very dark • Diarrhea or constipation • Stools that are more narrow than usual • Feeling that the bowel does not completely empty • Weight loss for no known reason • Abdominal discomfort, including gas pains, cramps or bloating • Fatigue Source: National Cancer Institute