Changes in Stool Shape: Could Polyps or Medication Be the Cause?

Stool-related: Over the past two weeks, the stool has become thin and elongated?

Hello, Doctor! I underwent a colonoscopy at the beginning of February this year.
The results showed that my bowel preparation was good, and there was a 0.2 cm hyperplastic polyp in the rectum, which was not removed.
Recently, for the past two weeks, I have noticed that my stools have become thinner and longer, differing from their previous fuller shape.
I would like to know if this could be caused by the polyp.
Additionally, I have a history of gastroesophageal reflux disease, which has recently recurred.
Two weeks ago, I started taking medication (omeprazole) to alleviate the symptoms.
Could this also be a potential cause of the change in stool shape? (I did not experience this issue with thin stools when I previously took this medication.) Thank you, Doctor!

BB, 20~29 year old female. Ask Date: 2023/05/26

Dr. Hu Guozheng reply Gastroenterology and Hepatology

Hello, the shape of stool is related to diet or diseases.
It is advisable to continue monitoring.
If there is a family history of illness or any concerns, a medical evaluation is recommended.
Thank you.

Reply Date: 2023/05/26

More Info

Changes in stool shape can be indicative of various underlying conditions, and your concerns regarding the potential causes related to polyps or medication are valid. Based on your description, it appears that you have experienced a change in your stool consistency and shape, which has prompted you to seek clarification on whether this could be attributed to the presence of a polyp or the medication you are currently taking.

Firstly, it is important to understand that the shape and consistency of stool can be influenced by several factors, including diet, hydration, gastrointestinal motility, and the presence of any abnormalities in the gastrointestinal tract. In your case, the presence of a 0.2 cm hyperplastic polyp in the rectum, while generally considered benign, could potentially contribute to changes in stool shape. Polyps can sometimes cause narrowing of the intestinal lumen, which may lead to thinner stools as they pass through the affected area. However, a polyp of this size is unlikely to cause significant obstruction or alteration in stool shape unless it is larger or there are multiple polyps present.

On the other hand, the medication you mentioned, omeprazole, is a proton pump inhibitor (PPI) commonly used to treat gastroesophageal reflux disease (GERD) and other acid-related disorders. While PPIs are generally well-tolerated, they can sometimes lead to gastrointestinal side effects, including changes in bowel habits. However, it is less common for PPIs to directly cause a change in stool shape to a thinner consistency. It is worth noting that any recent changes in your diet or lifestyle, as well as stress levels, could also play a role in altering your bowel movements.

Given that you have had a recent colonoscopy with normal findings aside from the small polyp, and considering that you have a history of GERD, it may be prudent to monitor your symptoms closely. If the change in stool shape persists or is accompanied by other concerning symptoms such as abdominal pain, blood in the stool, significant weight loss, or changes in appetite, it would be advisable to follow up with your healthcare provider for further evaluation. They may recommend additional diagnostic tests or imaging studies to rule out any other potential causes.

In summary, while the presence of a small polyp could potentially contribute to changes in stool shape, it is not the only factor to consider. The medication you are taking may also play a role, but it is essential to assess all aspects of your health, including dietary habits and lifestyle factors. If you have any further concerns or if your symptoms change, do not hesitate to reach out to your healthcare provider for personalized advice and management.

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