hi. here are the usual signs and symptoms of bowel problem (i.e. in cancer): changes in bowel and bladder habits (change in color, size, frequency), presence of blood (old or fresh) in the stool, abdominal pain or discomfort, abdominal enlargement, constitutional signs and symptoms such as fever (usually of unknown origin), significant weight loss. these are the most common signs and symptomatologies. presence or absence of one doesn t necessarily rule in or out a cancer pathology. a consult with a physician is best for complete medical and physical examination. diagnostic examinations and management (medical or surgical) will be done accordingly. hope this helps. good day!! ~dr.kaye