Although pain is not always a symptom of colon cancer, abdominal or back pain sometimes appear, according to MedlinePlus and the American Cancer Society. There is occasionally tenderness in the lower abdomen as well.
In certain cases, colon cancer presents other symptoms, such as bloody or narrow stools, diarrhea, constipation, or unexplained weight loss, MedlinePlus explains. A person sometimes experiences general fatigue or a feeling that the bowel never fully empties, Mayo Clinic states. In its early stages, colon cancer often does not cause symptoms. When symptoms do appear, they typically depend on where the cancer is located and how advanced it is.