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

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Mucus in stool?


Doctor, I have recently noticed that my stool (which is light yellow) has white, transparent, film-like substances resembling mucus mixed in with it.
What could this be? Sometimes, after having a bowel movement, there is a small amount of blood on the toilet paper when I wipe.

A-Ming, 20~29 year old female. Ask Date: 2005/09/25

Dr. Chen Shidian reply Gastroenterology and Hepatology


Hello Ah-Ming: Mucus is primarily a secretion from the colon and is usually harmless.
You can submit a stool sample for testing.
However, if there is blood in the stool, it is necessary to consult a gastroenterologist for a rectal examination or colonoscopy.
This is often caused by internal or external hemorrhoids, but it can also be due to inflammation, polyps, tumors, and other reasons.
Wishing you good health, Dr.
Chen Shidian.

Reply Date: 2005/09/25

More Info


Mucus in stool can be concerning, and it’s important to understand its potential causes and when to seek medical help. Mucus is a gel-like substance produced by the intestines to keep the lining of the bowel moist and to help with the passage of stool. While a small amount of mucus in stool can be normal, an increase in mucus production or the presence of blood can indicate underlying health issues.

In your case, the presence of white, transparent, mucus-like substances in your yellowish stool, along with traces of blood on the toilet paper, warrants attention. Here are some possible explanations for these symptoms:
1. Irritable Bowel Syndrome (IBS): IBS is a common gastrointestinal disorder that can cause symptoms such as abdominal pain, bloating, and changes in bowel habits, including diarrhea or constipation. Mucus in stool is often reported by individuals with IBS.

2. Infections: Gastrointestinal infections, whether viral, bacterial, or parasitic, can lead to increased mucus production. Infections can also cause diarrhea, abdominal pain, and sometimes blood in the stool.

3. Inflammatory Bowel Disease (IBD): Conditions like Crohn's disease or ulcerative colitis can cause inflammation in the intestines, leading to symptoms such as diarrhea, abdominal pain, and mucus in the stool. Blood may also be present due to inflammation or ulceration of the intestinal lining.

4. Colorectal Polyps or Cancer: While less common, the presence of blood in the stool can be a sign of colorectal polyps or cancer. Mucus may also be present if there is irritation or obstruction in the bowel.

5. Food Intolerances or Allergies: Certain food intolerances, such as lactose intolerance or gluten sensitivity, can lead to gastrointestinal symptoms, including mucus in the stool.

Given your symptoms, it is crucial to seek medical attention. A healthcare provider will likely recommend a thorough evaluation, which may include:
- Medical History and Physical Examination: Discussing your symptoms, duration, and any associated factors (like diet or stress) can provide valuable insights.

- Stool Tests: These can help identify infections or the presence of blood.

- Blood Tests: These can check for signs of inflammation, infection, or anemia.

- Imaging Studies: Depending on your symptoms, imaging studies like an abdominal ultrasound or CT scan may be necessary.

- Endoscopy: In some cases, a colonoscopy may be recommended to visualize the intestines directly and obtain biopsies if needed.

In summary, while mucus in stool can be a normal occurrence, the presence of blood and the specific characteristics of your stool suggest that you should consult a healthcare professional. Early diagnosis and treatment are essential for addressing any potential underlying conditions effectively. Don’t hesitate to reach out to a gastroenterologist or your primary care physician for further evaluation and guidance.

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