Is It Normal to Find Green Spots in Stool? Digestive Changes - Internal Medicine

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There is a small green piece in the stool?


Hello, if there is a small green piece in the stool (it looks like a piece of phlegm on the stool), is this normal or am I overthinking it? I remember that the day before, I only ate guava, could this be related? Thank you.

A-Shun, 30~39 year old female. Ask Date: 2016/04/08

Dr. Li Zhiyao reply Internal Medicine


Hello: It is recommended to consult a gastroenterologist and undergo examinations as needed.

Reply Date: 2016/04/08

More Info


When it comes to the presence of green spots in stool, it is important to understand that stool color can vary significantly based on a variety of factors, including diet, digestion, and overall health. In your case, the observation of a small green spot in your stool, which resembles phlegm, can be attributed to several potential causes.

Firstly, dietary choices play a significant role in stool color. Foods that are rich in chlorophyll, such as leafy greens (spinach, kale, etc.), can lead to green-colored stools. Additionally, certain fruits, like guava, which you mentioned consuming, can also contribute to this change in color. If you have eaten a significant amount of green vegetables or foods with artificial green coloring, this could explain the green spot you observed.

Secondly, the digestive process itself can influence stool color. If food moves through the intestines too quickly, it may not have enough time to break down completely, which can result in green stool. This rapid transit can occur due to various reasons, including gastrointestinal infections, stress, or certain medications. If the green spot is indeed a result of rapid transit, it may not necessarily indicate a serious health issue, especially if it is an isolated incident.

However, if you notice persistent changes in your stool color, consistency, or if you experience other symptoms such as abdominal pain, diarrhea, or blood in your stool, it is advisable to consult a healthcare professional. They can perform a thorough evaluation, including a physical examination and possibly laboratory tests, to rule out any underlying conditions.

In summary, finding a small green spot in your stool is not uncommon and can often be linked to dietary factors. If it is a one-time occurrence and you feel well otherwise, it may not be a cause for concern. However, if you continue to notice changes or have accompanying symptoms, seeking medical advice would be prudent. Remember, maintaining a balanced diet and staying hydrated are key components of digestive health.

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