Cancer

In its early stage, colorectal cancer usually produces no symptoms. The most likely warning signs include: Understanding Colorectal Cancer Find out more about colorectal cancer

Basics Symptoms Diagnosis and Treatment Prevention Changes in bowel movements, including persistent constipation or diarrhea, a feeling of not being able to empty the bowel completely, an urgency to move the bowels, rectal cramping, or rectal bleeding Dark patches of blood in or on stool; or long, thin, "pencil stools" Abdominal discomfort or bloating Unexplained fatigue, loss of appetite, and/or weight loss Pelvic pain, which occurs at later stages of the disease