Symptoms of colon cancer can include: A change in bowel habits, such as more-frequent, looser stools or diarrhea, constipation, or changes in stool shape. Rectal bleeding or blood in the stool. Dark, black-colored tarry stools. In its initial stages, colon cancer , or colorectal cancer , often presents no noticeable symptoms. Explore the typical signs, understand the significance of testing, and prioritize your health. WHO fact sheet on colorectal cancer , including risk factors, symptoms , treatments and prevention. Symptoms of colorectal cancer can include a lasting change in bowel habits; feeling that your bowel is not completely empty after having a bowel movement; bleeding from the rectum (usually...
