Stool that is narrower than normal (even as thin as a pencil) Changes in Bowel HabitsĬhanges in bowel habits that can indicate colon or rectal cancer include the following:Ĭhanges in frequency or size and caliber of bowel movementsĪ bowel that doesn’t seem to empty completely Typically, patients with hemorrhoids experience symptoms that come and go with flare-ups, whereas rectal bleeding caused by cancer usually continues or worsens and is more likely to be accompanied by pain.
Rectal bleeding can also be caused by hemorrhoids. Rectal Bleedingīright red blood in the stool typically indicates that there is bleeding in the rectum or colon, which may be a sign of colon or rectal cancer. This is called occult (hidden) blood and may not be discovered until a blood test indicates a low red blood cell count. Sometimes bleeding may be present but not visible. You may notice obvious blood the stool, or darker colored bowel movements, which may indicate that there is bleeding within the intestinal tract or rectum. These may include the following: Blood in the Stool Patients with colon cancer or rectal cancer may experience one or multiple symptoms. As the tumor grows, symptoms will depend on the location of the primary tumor within the intestine. Colon and rectal cancers do not usually produce symptoms in the early stages of disease.
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