White Cotton-Like Substance in Stool: Should You Be Concerned? - Gastroenterology and Hepatology

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After bowel movement, seeing a cotton-like white substance at the bottom of the toilet?


I have been experiencing gastrointestinal issues lately, with diarrhea occurring about once or twice a day.
Traditional Chinese medicine suggests that I have some symptoms of irritable bowel syndrome, and I tend to get anxious, which leads to abdominal pain.
I often alternate between diarrhea and constipation over a few days.
Am I at risk of developing colorectal cancer because of this? Recently, I have noticed a few times in the past three months that when I have a normal bowel movement, there are white, cotton-like objects appearing next to the stool, roughly smaller than a one-dollar coin.
Should I get this checked? What could it be? Thank you, doctor.

Xiong Xiaojie, 30~39 year old female. Ask Date: 2018/11/13

Dr. Lin Minghui reply Gastroenterology and Hepatology


Hello: The stool contains white, cotton-like substances, which may be sloughed-off epithelial mucus.
This could be related to irritable bowel syndrome.
A stool examination is recommended.
Colorectal cancer is associated with genetics, heredity, polyps, diet, obesity, and certain diseases (such as inflammatory bowel disease).
Wishing you peace and health! Sincerely, Dr.
Ming-Hui Lin, Attending Physician, Department of Gastroenterology, Taoyuan Hospital, Ministry of Health and Welfare.

Reply Date: 2018/11/13

More Info


Dear Patient,
Thank you for reaching out with your concerns regarding the white cotton-like substance you've noticed in your stool, along with your gastrointestinal symptoms. It’s understandable to feel anxious about changes in your bowel habits, especially when they are accompanied by discomfort and irregularities such as diarrhea and constipation.

Firstly, it’s important to clarify that the appearance of white, cotton-like material in your stool can be attributed to several factors. One possibility is that it could be undigested food particles, particularly if you have been consuming a diet high in fiber or certain types of foods that are not fully broken down during digestion. Another potential cause could be mucus, which is a normal substance produced by the intestines to help lubricate the bowel and facilitate the passage of stool. However, if you are noticing an unusual amount of mucus or if it is accompanied by other symptoms such as pain, blood in the stool, or significant changes in your bowel habits, it may warrant further investigation.

Regarding your concerns about irritable bowel syndrome (IBS) and the potential risk of colorectal cancer, it’s important to note that while IBS can cause significant discomfort and changes in bowel habits, it is not directly linked to an increased risk of colorectal cancer. However, persistent changes in bowel habits, especially if they are new or accompanied by alarming symptoms, should be evaluated by a healthcare professional. Regular screenings and consultations with your doctor can help ensure that any potential issues are addressed early.

Given your symptoms of alternating diarrhea and constipation, along with the presence of the white substance, I would recommend scheduling an appointment with your healthcare provider. They may suggest tests such as stool analysis, imaging studies, or even a colonoscopy, depending on your age, family history, and the specifics of your symptoms. These tests can help rule out any serious conditions and provide peace of mind.

In the meantime, consider keeping a food diary to track what you eat and how it correlates with your symptoms. This can help identify any potential food intolerances or triggers that may be contributing to your gastrointestinal distress. Additionally, managing stress through relaxation techniques, regular exercise, and a balanced diet rich in fiber can also help alleviate symptoms associated with IBS.

In summary, while the presence of a white cotton-like substance in your stool can be concerning, it is not necessarily indicative of a serious condition. However, due to the changes in your bowel habits and the discomfort you are experiencing, it is advisable to consult with a healthcare professional for a thorough evaluation. They can provide you with the appropriate guidance and treatment options tailored to your specific situation.

Wishing you good health and relief from your symptoms.

Best regards.

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