Sudden weight loss
Unintentional weight loss of ten pounds or more within six months or less can be an early warning sign for many different types of cancer, including colorectal cancer. Weight loss occurs in combination with cancer because the presence of cancer cells can release substances into the body that change the way food is absorbed. Weight loss can also result from a blockage in the colon when the tumor has grown large enough, which will affect bowel movements and weight.
Changes in bowel movements
If you begin to experience inexplicable changes in your bowel movements and habits, such as diarrhea or constipation that lasts longer than normal, this may be an early warning sign for bowel cancer. The colon is the last part of the digestive system and plays an important role in processing waste and absorbing fluid as the body prepares for elimination. Cancer of the colon or rectum can cause a blockage, making it more difficult for the organ to do its job properly and causing changes in the elimination of waste.
Constipation
Constipation can be a cause or a consequence of colon cancer. Chronic constipation is one of the leading causes of intestinal polyps, and these digital protrusions into the intestinal lumen might turn into cancer after a while. At the same time, late-stage cancer can cause constipation as well, especially when associated with bowel obstruction.
Blood in Stool
Colon and rectal cancers do not always show symptoms, but one of the most common warning signs is the presence of blood in the stool. It is important to note that the presence of blood in the stool does not automatically mean that you have bowel cancer. Hemorrhoids and anal fissures are much more common causes of the presence of blood in the stool, but the issue should still be referred to your doctor so the cause can be identified and addressed.
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