Mucus in Stool: Causes and When to Seek Medical Advice - Gastroenterology and Hepatology

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Mucus in stool?


Hello Doctor, previously I had bowel movements approximately every two days, but it changed to once or twice a day.
I visited the clinic over a month ago and underwent a fecal occult blood test, which diagnosed me with irritable bowel syndrome (IBS).
All items in the fecal occult blood test were normal.
However, in the last week or two, I suddenly started experiencing constipation, having a bowel movement only once every four days.
After I do have a bowel movement, I notice mucus being expelled, which does not mix with the stool and is clear in color.
The frequency is about twice, with mucus appearing after one of the bowel movements, while the stool color remains normal.
I do not have any abdominal pain.
Recently, my eating habits have changed; I only eat lunch and have yogurt or fruit in the evening.
I have never experienced mucus in my stool before.
What could be the cause of this? Do I need to seek further medical attention?

shelley, 20~29 year old female. Ask Date: 2015/01/14

Dr. Chen Qifeng reply Gastroenterology and Hepatology


Hello: To diagnose irritable bowel syndrome (IBS), it is essential to first rule out any structural abnormalities of the colon.
If relevant tests, such as colonoscopy and stool examinations, have already been performed, a diagnosis can then be made.
If it is indeed IBS, management should focus on diet, lifestyle habits, and stress relief.
Wishing you peace and good health.
Sincerely, Dr.
Chi-Feng Chen, Gastroenterology Department, Taoyuan General Hospital, Ministry of Health and Welfare.

Reply Date: 2015/01/14

More Info


Understanding mucus in stool can be quite concerning, especially when there are changes in bowel habits and the consistency of stool. Mucus is a normal secretion produced by the intestines to lubricate the lining and facilitate the passage of stool. However, an increase in mucus, especially when accompanied by changes in bowel habits, can indicate an underlying issue.

In your case, you mentioned that you previously had a bowel movement every two days, which then changed to daily movements, and recently, you have experienced constipation with mucus in your stool. The fact that you have been diagnosed with irritable bowel syndrome (IBS) is significant, as IBS can cause a variety of symptoms, including changes in bowel habits, abdominal discomfort, and the presence of mucus.

The sudden onset of constipation after a period of more frequent bowel movements, along with the presence of clear mucus, could be attributed to several factors:
1. Dietary Changes: You mentioned that your eating habits have changed recently, consuming only lunch and then yogurt or fruit for dinner. This significant reduction in food intake can lead to constipation, as your body may not be receiving enough fiber or bulk to promote regular bowel movements. A diet low in fiber can also lead to the production of more mucus as the intestines try to facilitate the passage of harder stools.

2. Dehydration: If your fluid intake has decreased alongside your dietary changes, this can contribute to constipation. Adequate hydration is crucial for maintaining normal bowel function.

3. Irritable Bowel Syndrome (IBS): As you have been diagnosed with IBS, it is important to note that this condition can lead to alternating patterns of diarrhea and constipation. The presence of mucus can also be a common symptom in IBS, particularly when experiencing constipation.

4. Infection or Inflammation: While less likely given your normal stool tests, infections or inflammatory conditions of the intestines can also lead to increased mucus production. Conditions such as colitis or even infections can cause changes in stool consistency and the presence of mucus.

Given these considerations, it is advisable to monitor your symptoms closely. If the mucus persists, or if you experience any new symptoms such as abdominal pain, blood in the stool, or significant changes in your bowel habits, it would be prudent to seek medical advice. A healthcare professional may recommend further evaluation, which could include additional stool tests, imaging studies, or even a colonoscopy, depending on your symptoms and medical history.

In the meantime, consider making dietary adjustments to increase your fiber intake, such as incorporating whole grains, fruits, vegetables, and legumes into your meals. Staying well-hydrated is also essential. If you find that dietary changes do not alleviate your symptoms, or if you have concerns about your health, do not hesitate to reach out to a healthcare provider for personalized advice and management.

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