Everyone experiences occasional bouts of diarrhea or constipation. The warning sign here is a persistent and new change in your typical pattern.
This means a sudden onset of constipation that doesn’t respond to typical remedies, or new, unexplained diarrhea that lasts for weeks. The change is often described as alternating—swings between constipation and loose stools. This suggests that a tumor is affecting the colon’s ability to move waste or absorb water normally.
2. Occult (Hidden) Blood Detected in Stool
This is the sign often caught by early screening tests like the Fecal Immunochemical Test (FIT) or Fecal Occult Blood Test (FOBT). Occult blood is microscopic blood that is not visible to the naked eye but indicates bleeding somewhere in the digestive tract.
While not visible, the presence of occult blood is a major warning. This silent bleeding may be the only sign of a slow-growing polyp or early-stage tumor. This is why regular screening is so vital—it detects this crucial warning long before symptoms ever appear.
1. Visible Rectal Bleeding or Dark Stools
This is the starkest warning sign and should prompt an immediate call to your physician. Visible rectal bleeding (bright red blood) is often dismissed as hemorrhoids, especially if the bleeding is painless. While hemorrhoids are a common cause, you should never assume this without a medical evaluation.
Additionally, blood higher up in the colon may turn the stool dark red, maroon, or even black and tarry (melena), indicating the blood has been partially digested. Any visible change in the color of your stool that suggests blood is a medical emergency and the most urgent sign on this list.
Time to Act: Don’t Wait for the Alarm Bells
The power of recognizing these eight signs lies in the motivation they provide for preventative action. Colon cancer is unique in that it is highly preventable if polyps are removed before they become malignant.
If you are 45 or older, or if you have a family history of colon cancer, now is the time to prioritize screening.
- Screening is Prevention: A colonoscopy is the gold standard because it not only detects cancer but also removes the precancerous polyps, effectively preventing the disease.
- Talk to Your Doctor: If you experience any of the eight warning signs for more than a few days, do not self-diagnose. Be explicit with your doctor about the persistent changes in your bowel habits, fatigue, or abdominal discomfort.
Don’t let regret be your motivation. Listening to your body’s whispers today could ensure a long, healthy future.
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