Colon Cancer: Don't Ignore These 5 Early Warning Signs

Saturday - 28/06/2025 12:15
5 early symptoms of Colon Cancer that can be easily ignored

Colon cancer, also known as colorectal cancer, develops in the colon or rectum. It often begins as small, noncancerous cell clumps called polyps, which can become cancerous over time. While most cases occur randomly, family history, obesity, and lifestyle can elevate the risk. Symptoms can be subtle, often mistaken for digestive issues. However, certain warning signs should not be ignored.

Illustration of digestive system with highlighted colon.

1. Changes in Bowel Habits

A noticeable change in bowel habits is one of the earliest signs of colon cancer. This includes:

  • Increased diarrhea or constipation frequency
  • Alternating between diarrhea and constipation
  • Stools that are narrower or thinner than usual

These changes might seem minor and easily attributed to diet, stress, or infections. However, if they persist for more than a few days or recur, it could indicate colon cancer. Persistent changes suggest a growing tumor may be disrupting normal bowel movements.

Close-up of stool sample with visible blood.

2. Blood in Stool

Blood in the stool should never be ignored. It can manifest as:

  • Bright red blood on the stool surface or toilet paper
  • Dark or black, tarry stools, indicating older blood

Sometimes, the bleeding is microscopic, leading to anemia over time. While blood in the stool can stem from hemorrhoids or infections, ruling out colon cancer is crucial, especially if it recurs or is accompanied by other symptoms.

3. Abdominal Discomfort or Pain

Persistent abdominal discomfort is another early symptom that is often overlooked. This may include:

  • Cramps or gas pains
  • Bloating or a feeling of fullness
  • General belly pain that doesn't subside

Such discomfort can be mistaken for indigestion or other minor digestive issues. However, if the pain is ongoing and unrelated to diet or lifestyle changes, it could indicate a tumor causing irritation or blockage in the colon.

Person holding abdomen in pain.

4. Fatigue and Weakness

Feeling unusually tired or weak without a clear reason can be a subtle sign of colon cancer, especially if accompanied by other factors. Slow, unnoticed bleeding in the colon can lead to iron deficiency anemia. This reduces the body's ability to carry oxygen, resulting in fatigue, shortness of breath, and weakness.

Exhausted person resting head on hands.

5. Rapid Weight Loss

Unexplained weight loss is a common symptom in most cancers, including colon cancer. The body's immune system works overtime when fighting cancer, and tumors can affect digestion and appetite. If you notice significant weight loss without changes in diet or exercise, consult a doctor.

Person stepping on scale, showing significant weight loss.

Disclaimer: This article is for informational purposes only and does not substitute medical advice. Consult a healthcare professional for any health concerns.

Sources:

  • MD Anderson Cancer Center – Colorectal Cancer Symptoms
  • Mayo Clinic – Colon Cancer Symptoms and Causes
  • National Cancer Institute – Warning Signs of Colorectal Cancer in Younger Adults
  • Cleveland Clinic – Colon Cancer Symptoms, Stages & Treatment

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