Stool Shapes: What Your Bowel Movements Say About Your Health

Bowel issues

Hello, doctor.
Yesterday I asked you about the shape of my stool, and I later noticed that on two occasions, a small segment of my stool appeared flattened on one side, although not every time; sometimes it is cylindrical.
Is this considered normal or abnormal? Thank you for your response.

Jie, 20~29 year old female. Ask Date: 2019/01/04

Dr. Chen Qifeng reply Gastroenterology and Hepatology

If there is indeed a tumor lesion, once it causes the stool to become thin or flat, it should only continue to become thinner.

Reply Date: 2019/01/04

More Info

Understanding the shapes and consistency of your stool can provide valuable insights into your digestive health. The Bristol Stool Chart is a commonly used tool that categorizes stool into seven types, ranging from hard lumps (Type 1) to liquid consistency (Type 7). Ideally, healthy stool should be well-formed, smooth, and easy to pass, typically resembling a sausage or snake (Type 4).

In your case, you mentioned observing stool that appears flattened on one side, which could indicate a few different things. The occasional presence of this shape, especially if it is not consistent, may not be a cause for immediate concern. However, if you notice this shape frequently or if it is accompanied by other symptoms such as pain, discomfort, or changes in bowel habits, it may warrant further investigation.

Flattened stool can sometimes be a sign of increased pressure in the rectum, which may occur due to various factors, including:
1. Dietary Changes: A diet low in fiber can lead to harder stools that may not take on their usual shape. Ensure you are consuming enough fruits, vegetables, and whole grains to promote healthy bowel movements.

2. Dehydration: Insufficient fluid intake can lead to harder stools, making them more difficult to pass and potentially altering their shape. Aim to drink plenty of water throughout the day.

3. Bowel Obstruction: In some cases, a more serious condition such as a bowel obstruction can cause changes in stool shape. This is less common but should be considered if you experience significant changes in bowel habits or abdominal pain.

4. Rectal or Colonic Issues: Conditions such as hemorrhoids, anal fissures, or even more serious issues like colorectal cancer can lead to changes in stool shape. If you have concerns about these possibilities, it is essential to consult a healthcare professional for a thorough evaluation.

Regarding the occasional return to a more typical cylindrical shape, this variability can be normal, especially if your diet and hydration levels fluctuate. However, consistency is key when it comes to bowel health. Regularly experiencing flattened stools or other unusual shapes may indicate that your digestive system is not functioning optimally.

To maintain healthy bowel movements, consider the following tips:
- Increase Fiber Intake: Aim for a daily intake of 25-30 grams of fiber from fruits, vegetables, legumes, and whole grains. Fiber helps to bulk up stool and promote regularity.

- Stay Hydrated: Drink plenty of fluids, particularly water, to help soften stool and facilitate easier passage.

- Regular Exercise: Physical activity can stimulate bowel function and help prevent constipation.

- Monitor Your Diet: Keep track of any foods that may trigger changes in your bowel movements. Some individuals may be sensitive to dairy, gluten, or high-fat foods.

- Establish a Routine: Try to have bowel movements at the same time each day, allowing your body to develop a regular pattern.

If you continue to experience irregularities in your stool shape or if you have any accompanying symptoms such as pain, bleeding, or significant changes in bowel habits, it is advisable to consult a healthcare provider. They can perform a thorough assessment and determine if any further testing or treatment is necessary. Remember, your digestive health is an essential aspect of your overall well-being, and addressing any concerns promptly can help prevent more serious issues down the line.

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