Constipation: An Early Symptom of Colorectal Cancer

Constipation is a common issue, but it can also signal more serious health conditions, such as colorectal cancer. Colorectal cancer, which affects the colon and rectum, may cause a blockage leading to persistent constipation. Recognising when constipation is linked to cancer is crucial for early detection. If constipation lasts or is accompanied by other symptoms like blood in stool or unexplained weight loss, it may require further medical evaluation, at Pantai Hospitals can get screening with a professional taking care of you always.

What Is Constipation and How Is It Linked to Colorectal Cancer?

Constipation is typically characterised by difficulty in passing stools, infrequent bowel movements, or a feeling of incomplete evacuation. Most people experience occasional constipation, but when it becomes persistent, it can signal underlying health problems.

Colorectal cancer, which includes cancer of the colon or rectum, is one of the most common types of cancer globally. In some cases, constipation can develop as an early warning sign of colorectal cancer. The tumor in the colon or rectum may cause a blockage or narrowing of the intestines, making it difficult for stool to pass through.

How Constipation Relates to Colorectal Cancer:

• A tumor can obstruct the colon, causing reduced stool passage.
• Changes in bowel habits, such as constipation, are often among the earliest symptoms.
• Blood in the stool or mucus alongside constipation may be a red flag.

Why Does Constipation Occur in Colorectal Cancer?

When a tumor grows in the colon or rectum, it can block the normal passage of stool. This blockage leads to a build-up of waste material in the intestines, resulting in constipation. The pressure from the tumor may affect normal bowel motility, causing the muscles in the intestines to function abnormally.

Possible Causes of Constipation in Colorectal Cancer:

• Tumor obstruction
  A growth that blocks the passage of stool.
• Changes in bowel function
  Cancer can alter how the intestines move, leading to slower stool movement.
• Psychological factors
  Stress and anxiety due to illness can also contribute to constipation.

When Should You Be Concerned About Constipation?

While occasional constipation is normal and often resolves on its own, persistent or severe constipation warrants medical attention, especially if it occurs with other concerning symptoms. If you experience the following alongside constipation, it may be time to consult a healthcare provider:

• Blood in the stool

  Even small amounts of blood could signal internal bleeding due to cancer.

• Unexplained weight loss

  Sudden weight loss without trying is often linked to cancer.

• Fatigue and weakness

  Persistent tiredness can be a sign of anaemia caused by internal bleeding.

• Changes in stool consistency

  Narrow or pencil-thin stools may suggest a blockage in the colon.

• Abdominal pain or bloating

  Unexplained discomfort in the abdomen may indicate cancer.

Early detection of colorectal cancer significantly improves treatment outcomes, so it is essential to be proactive in seeking medical advice when symptoms persist.

How to Diagnose Colorectal Cancer Early?

If constipation persists or other concerning symptoms arise, your healthcare provider may recommend several tests to rule out or confirm colorectal cancer. These tests typically include:

• Colonoscopy is a procedure where a flexible tube with a camera is inserted into the rectum to examine the colon for tumours or abnormalities.
• Stool tests a fecal occult blood test (FOBT) can check for hidden blood in the stool, which may indicate cancer.
• CT scans or MRI Imaging tests may be used to detect any tumours or changes in the colon.
• Blood tests to check for anaemia, which may be caused by internal bleeding from a tumour.

Important Facts about Early Detection:

Screening: Regular screening for colorectal cancer is recommended for adults over 45, or earlier if you have a family history of colorectal cancer or certain genetic conditions.

Risk Factors: A family history of colorectal cancer, age, a diet high in red or processed meats, smoking, and a sedentary lifestyle can increase your risk.

Book an Appointment with Pantai Hospitals 

While constipation is often a minor issue, it can sometimes signal more serious health concerns, including colorectal cancer. If you have experienced persistent constipation or other alarming symptoms such as blood in your stool, abdominal pain, or unexplained weight loss, it is crucial to seek medical advice as soon as possible. Early detection and treatment can significantly improve outcomes, and at Pantai Hospitals, we specialise in comprehensive diagnostic services for colorectal health.

Our experienced team of specialists can guide you through the screening process and ensure that you receive the best care tailored to your needs. Do not wait until symptoms worsen—take charge of your health today. Book your appointment at Pantai Hospitals now to get the expert care you deserve. You may also book an appointment by downloading the MyHealth360 application from Google Play Store or Apple App Store. 

Pantai Hospitals have been accredited by the Malaysian Society for Quality in Health (MSQH) for its commitment to patient safety and service quality.

References

1. Colon Cancer: Symptoms, Stages & Treatment. (n.d.). Cleveland Clinic. Retrieved January 27, 2025, from
   https://my.clevelandclinic.org/health/diseases/14501-colorectal-colon-cancer
2. Constipation - Symptoms and causes. (2023, October 20). Mayo Clinic. Retrieved January 27, 2025, from
   https://www.mayoclinic.org/diseases-conditions/constipation/symptoms-causes/syc-20354253
3. Parikh, A. (2024, August 19). How to Detect Colon Cancer Early. Mass General Brigham. Retrieved January 27, 2025, from
   https://www.massgeneralbrigham.org/en/about/newsroom/articles/how-to-detect-colon-cancer-early
4. Staller, K., Olén, O., Söderling, J., Roelstraete, B., Törnblom, H., Song, M., & Ludvigsson, J. F. (2022). Chronic Constipation as a Risk Factor for Colorectal Cancer: Results From a Nationwide, Case-Control Study. Clinical gastroenterology and hepatology : the official clinical practice journal of the American Gastroenterological Association, 20(8), 1867–1876.e2. https://doi.org/10.1016/j.cgh.2021.10.024