Flat Stools: Causes and What They Mean for Your Health - Gastroenterology and Hepatology

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Flat stools?


Hello doctor, I would like to ask what it means when my stool becomes flattened (not formed).

Yu, 10~19 year old female. Ask Date: 2021/03/22

Dr. Chen Shidian reply Gastroenterology and Hepatology


You may have insufficient fiber intake; please eat more fruits and vegetables.

Reply Date: 2021/03/22

More Info


Flat stools, or stools that appear flattened or ribbon-like, can be a cause for concern and may indicate various underlying health issues. Understanding the potential causes and implications of this change in stool shape is crucial for maintaining digestive health.

One of the most common reasons for flat stools is the presence of a blockage in the intestines. This can occur due to conditions such as colorectal polyps, tumors, or strictures (narrowing of the intestines). When the stool passes through a narrowed section of the bowel, it can take on a flattened appearance. While not all cases of flat stools are indicative of a serious condition, it is essential to monitor this symptom, especially if it persists or is accompanied by other concerning signs.

Another potential cause of flat stools is irritable bowel syndrome (IBS), a functional gastrointestinal disorder characterized by symptoms such as abdominal pain, bloating, and changes in bowel habits. In some individuals with IBS, stool consistency and shape can vary, leading to occasional flat stools. Stress and dietary factors often exacerbate IBS symptoms, so managing these aspects can be beneficial.

Infections or inflammation in the gastrointestinal tract can also lead to changes in stool shape. Conditions such as gastroenteritis or inflammatory bowel disease (IBD), which includes Crohn's disease and ulcerative colitis, can cause alterations in bowel movements. If flat stools are accompanied by symptoms such as diarrhea, abdominal pain, or blood in the stool, it is crucial to seek medical attention promptly.

Dietary factors can also play a role in the appearance of stools. A diet low in fiber can lead to harder, less formed stools, which may appear flatter as they pass through the intestines. Ensuring an adequate intake of dietary fiber from fruits, vegetables, whole grains, and legumes can help promote regular bowel movements and improve stool consistency.

If you notice a sudden change in your stool shape, particularly if it persists for more than a few days, it is advisable to consult a healthcare professional. They may recommend diagnostic tests such as a colonoscopy or imaging studies to evaluate the condition of your intestines and rule out any serious issues.

In summary, flat stools can be caused by a variety of factors, including intestinal blockages, functional gastrointestinal disorders, infections, and dietary habits. It is essential to pay attention to accompanying symptoms and seek medical advice if you have concerns about your digestive health. Maintaining a balanced diet rich in fiber, staying hydrated, and managing stress can contribute to overall gastrointestinal well-being. Regular check-ups with a healthcare provider can also help monitor any changes in bowel habits and address potential issues early on.

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