White Floating Substance in Stool: When to Seek Medical Advice - Gastroenterology and Hepatology

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After defecation, there is a white layer floating on the water?


Hello doctor, I went to the bathroom twice today.
The first time was normal, but during the second time, I felt some abdominal pain and had a slight sensation of diarrhea.
I'm wondering if it was because I ate too much greasy food yesterday (for breakfast, I had pan-fried dumplings and hash browns, and for dinner, I had chicken nuggets, fried eggplant, and scallion pancakes).
After the second bowel movement, there was a layer of white substance floating on the water's surface, but aside from that, I have no other issues.
I would like to ask what this could be and if I need to see a doctor.

a, 10~19 year old female. Ask Date: 2023/05/13

Dr. Chen Shidian reply Gastroenterology and Hepatology


Based on the described symptoms, it is possible that fat droplets are floating in the stool.
If this is not a persistent issue, there is usually no need for significant concern.
It is recommended to improve dietary habits by avoiding excessive consumption of fried foods, desserts, and other high-fat foods, while increasing the intake of fruits, vegetables, and whole grains, along with regular exercise.
Additionally, if the symptoms persist or worsen, it is advisable to consult a family medicine physician or a gastroenterologist for further evaluation and assessment.

Reply Date: 2023/05/13

More Info


When it comes to noticing unusual substances in your stool, such as a white floating substance, it can understandably cause concern. The appearance of white floating material in stool can be attributed to several factors, and understanding these can help determine whether medical advice is necessary.

Firstly, the presence of floating stool can often be linked to dietary choices. Foods that are high in fat can lead to the production of floating stools, as fat is less dense than water. Given your recent meals, which included fried foods like chicken nuggets and eggplant, it is possible that the white substance you observed is related to undigested fat. This is particularly true if your body is not effectively absorbing fats, a condition known as steatorrhea. Steatorrhea can result from various gastrointestinal issues, including malabsorption syndromes, pancreatitis, or liver disease.

Additionally, the white floating substance could also be mucus. Mucus in the stool can occur due to irritation in the intestines, which can be caused by dietary changes, infections, or inflammatory bowel diseases. If the mucus is accompanied by other symptoms such as diarrhea, abdominal pain, or changes in bowel habits, it may warrant further investigation.

In your case, since you mentioned experiencing some abdominal discomfort and a slight feeling of diarrhea, it would be prudent to monitor your symptoms closely. If the discomfort persists, or if you notice any additional symptoms such as blood in the stool, significant changes in bowel habits, or prolonged diarrhea, it would be advisable to seek medical attention. A healthcare provider can perform a thorough evaluation, which may include a physical examination, stool tests, or imaging studies, to determine the underlying cause of your symptoms.

In summary, while the presence of a white floating substance in your stool may not be an immediate cause for alarm, it is essential to consider your overall symptoms and dietary habits. If you continue to experience discomfort or if your stool changes significantly, consulting a healthcare professional would be the best course of action. They can provide personalized advice and treatment options based on a comprehensive assessment of your health. Remember, it is always better to err on the side of caution when it comes to your health.

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