Frequent Urge to Defecate After Colonoscopy: Causes and Solutions - Surgery

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Does undergoing a colonoscopy cause frequent urges to have a bowel movement?


Hello Dr.
Ke,
I would like to ask you about my father, who is 66 years old.
He underwent a comprehensive health check-up in May, which included a colonoscopy.
Since the check-up, he has been experiencing frequent urges to have a bowel movement but is unable to pass stool.
Prior to the check-up, everything was normal.
This issue has persisted for nearly a month.
Could you please advise on the possible causes? Are there any methods for improvement? Thank you.

Xiao Lin, 30~39 year old female. Ask Date: 2013/06/15

Dr. Ke Fangxu reply Surgery


Hello: "Having the urge to defecate but being unable to do so" is clinically referred to as tenesmus, which is a reaction to the presence of a foreign body in the rectum.
The most severe diagnosis is rectal cancer; however, if a colonoscopy has already been performed, this possibility can be ruled out.
The next consideration is irritable bowel syndrome (IBS), which is a symptom resulting from impaired colonic motility and can generally be improved with medication.
Additionally, severe hemorrhoids or rectal prolapse can also cause this condition.
If one prefers not to use medication temporarily, they can start by improving dietary habits and lifestyle, increasing fiber intake, reducing the consumption of fatty foods, and avoiding spicy and irritating foods as well as tobacco and alcohol.
If symptoms are severe and affect daily life, medication is still recommended.

Reply Date: 2013/06/15

More Info


Frequent urges to defecate after a colonoscopy can be concerning, especially when they are accompanied by difficulty in passing stool. This situation can arise from several factors related to the procedure itself, as well as pre-existing conditions that may have been exacerbated by the colonoscopy.

Firstly, it is important to understand that a colonoscopy involves the insertion of a flexible tube into the rectum and through the colon. This process can cause temporary irritation to the intestinal lining, leading to sensations of urgency or discomfort. The bowel preparation required before the procedure, which often includes laxatives, can also contribute to changes in bowel habits. After the procedure, some patients may experience a transient increase in bowel frequency or urgency as the intestines recover from the manipulation and cleaning.

In your father's case, the sudden onset of frequent urges to defecate after a previously normal state could be attributed to several factors:
1. Post-Procedure Effects: After a colonoscopy, it is common for patients to experience some degree of bowel irritation. This can manifest as increased urgency or discomfort during bowel movements. Typically, these symptoms should resolve within a few days to a week.

2. Bowel Preparation: The laxatives used for bowel preparation can disrupt the normal flora of the gut and lead to temporary changes in bowel habits. This can result in increased urgency or diarrhea-like symptoms.

3. Underlying Conditions: If your father had any underlying gastrointestinal issues that were not previously diagnosed, the colonoscopy might have exacerbated these conditions. For example, conditions like irritable bowel syndrome (IBS) or inflammatory bowel disease (IBD) can lead to symptoms of urgency and difficulty in defecation.

4. Psychological Factors: Sometimes, the anxiety associated with medical procedures can lead to changes in bowel habits. If your father is feeling anxious about his health following the colonoscopy, this could contribute to his symptoms.

To address these issues, here are some potential solutions and recommendations:
- Dietary Adjustments: Encourage your father to maintain a high-fiber diet, which can help regulate bowel movements and alleviate symptoms of urgency. Foods rich in fiber include fruits, vegetables, whole grains, and legumes. Staying hydrated is also crucial, as it helps soften stool and promotes regularity.

- Probiotics: Consider introducing probiotics into his diet. Probiotics can help restore the natural balance of gut bacteria, which may have been disrupted by the bowel preparation and the colonoscopy itself.

- Follow-Up Consultation: It is essential for your father to follow up with his healthcare provider or a gastroenterologist. They can assess his symptoms more thoroughly, possibly perform additional tests if necessary, and provide tailored advice based on his specific situation.

- Monitoring Symptoms: Keep a record of his bowel habits, including the frequency of urges, consistency of stool, and any associated symptoms like pain or bloating. This information can be valuable for his healthcare provider in diagnosing any underlying issues.

- Medication Review: If your father is taking any medications, it may be worth reviewing them with his doctor to determine if any could be contributing to his symptoms.

In summary, while it is not uncommon to experience changes in bowel habits following a colonoscopy, persistent symptoms warrant further evaluation. By addressing dietary habits, considering probiotics, and consulting with a healthcare provider, your father can work towards alleviating his symptoms and restoring normal bowel function.

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