Small or Unformed Stool: When to See a Gastroenterologist - Gastroenterology and Hepatology

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Small or unformed stools?


Hello doctor, for the past two months, my stools have been smaller or unformed, and sometimes I experience diarrhea.
When I am aware, I can no longer pass large stools.
The color of my stools is yellow-brown, which seems normal.
I go to the bathroom several times a day depending on my food intake.
Additionally, I feel the urge to have a bowel movement right after eating.
What could be the issue? Should I see a gastroenterologist? If I do, will I need to undergo an endoscopy or colonoscopy?

Xiao Pi, 20~29 year old female. Ask Date: 2022/08/19

Dr. Lin Minghui reply Gastroenterology and Hepatology


Hello: It is recommended to pay attention to your diet and avoid greasy foods.
Given your age and symptoms, the most common possibility may be irritable bowel syndrome (IBS).
It is advisable to maintain good dietary hygiene, manage stress, engage in moderate exercise, and ensure adequate fluid and fiber intake.
Establishing regular bowel habits is important.
If there are no improvements, a stool examination and, if necessary, a gastrointestinal endoscopy should be considered.
If you experience fever, palpitations, weight loss, or blood in your stool, seek medical attention promptly.
Wishing you good health!

Reply Date: 2022/08/19

More Info


When experiencing changes in bowel habits, such as consistently small or unformed stools, it is essential to consider various factors that could contribute to these symptoms. Based on your description, it seems you are dealing with a situation that could be indicative of several gastrointestinal issues, including irritable bowel syndrome (IBS), dietary intolerances, or even inflammatory bowel disease (IBD).
The fact that your stools are small, unformed, and sometimes watery suggests that your bowel may be reacting to something in your diet or a potential underlying condition. The yellow-brown color of your stools is generally considered normal, but the frequency of your bowel movements—multiple times a day—combined with the urgency to defecate after eating, could indicate a functional gastrointestinal disorder.
Irritable bowel syndrome (IBS) is a common condition that affects the large intestine and can lead to symptoms such as cramping, abdominal pain, bloating, gas, and diarrhea or constipation. In your case, the urgency to defecate after meals and the small, unformed stools could align with IBS, particularly the diarrhea-predominant type (IBS-D). Stress, dietary choices, and certain food intolerances (like lactose or gluten) can exacerbate these symptoms.

Another possibility is the presence of intestinal inflammation, which could be due to conditions such as IBD, including Crohn's disease or ulcerative colitis. These conditions can lead to changes in bowel habits, abdominal pain, and other systemic symptoms. However, they are typically accompanied by more severe symptoms, such as weight loss, fever, or blood in the stool.

Given your symptoms, it is advisable to consult a gastroenterologist. They can perform a thorough evaluation, which may include a detailed medical history, a physical examination, and possibly diagnostic tests. These tests could include stool studies to check for infections or malabsorption issues, blood tests to look for signs of inflammation or anemia, and imaging studies if necessary.

Regarding endoscopic procedures like an upper endoscopy (EGD) or colonoscopy, the decision to perform these tests would depend on your specific symptoms and the findings from your initial evaluation. If there are concerns about inflammatory bowel disease or other significant gastrointestinal conditions, a colonoscopy may be warranted to visualize the colon and obtain biopsies if needed. An upper endoscopy might be considered if there are symptoms suggestive of upper gastrointestinal issues, such as acid reflux or gastritis.

In summary, while your symptoms could be related to functional gastrointestinal disorders like IBS, it is crucial to seek professional medical advice to rule out more serious conditions. A gastroenterologist will be able to guide you through the necessary steps, including whether any endoscopic evaluations are needed based on your clinical presentation. In the meantime, keeping a food diary to track your diet and symptoms may provide valuable information for your healthcare provider. Additionally, maintaining a balanced diet rich in fiber, staying hydrated, and managing stress can also help improve your bowel habits.

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