Introduction
Colon cancer, also known as colorectal cancer, is one of the leading causes of cancer-related deaths worldwide. It often develops silently, with symptoms appearing only in the later stages. While common signs like blood in the stool, persistent constipation, or abdominal pain are well-known, there are several unusual symptoms that people often overlook. Recognizing these less obvious signs early can significantly improve the chances of successful treatment.
1. Unexplained Weight Loss
Most people associate weight loss with diet or exercise changes, but sudden, unintentional weight loss without any clear reason can be an early sign of colon cancer. This happens because the cancer alters metabolism and may interfere with the body’s ability to absorb nutrients. Tumors can also increase inflammation, leading to appetite loss.
2. Persistent Fatigue and Weakness
Fatigue is common in daily life, but chronic tiredness that does not improve with rest could indicate colon cancer. This occurs due to iron deficiency anemia, which happens when the tumor causes slow, internal bleeding. The loss of red blood cells reduces oxygen supply to the body, making a person feel constantly weak and exhausted.
3. Changes in Stool Shape
A shift in the size or shape of stools—such as stools becoming thinner or more ribbon-like—can be a warning sign. A tumor in the colon can partially block the passage of waste, leading to narrowed stools. If these changes persist, medical evaluation is necessary.