Signs and symptoms of rectal cancer include:  A change in bowel habits, such as diarrhea, constipation or more-frequent bowel movements Dark maroon or bright red blood in stool Narrow stool A feeling that your bowel doesn't empty completely Abdominal pain Unexplained weight loss Weakness or fatigue 
signs symptoms rectal cancer include:  change bowel habits  diarrhea  constipation more-frequent bowel movements dark maroon bright red blood stool narrow stool feeling bowel doesn't empty completely abdominal pain unexplained weight loss weakness fatigue 
rectal cancer