Stool Color Changes: What Do They Mean for Your Health? - Gastroenterology and Hepatology

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Bowel issues


Hello Doctor: Recently, my stool often appears to have two colors visible to the naked eye (without a distinct boundary), one is the usual brown and the other is a reddish-brown.
Could this be blood in the stool? How can I determine if it is mucus in the stool? Is it possible for an anal fissure to cause dark red blood to be present?

Niming, 20~29 year old female. Ask Date: 2022/06/30

Dr. Chen Shidian reply Gastroenterology and Hepatology


Anal fissure presents with bright red blood.
No other symptoms are noted; observation can continue.

Reply Date: 2022/06/30

More Info


Understanding stool color changes is crucial for assessing your health, as these changes can indicate various underlying conditions. The appearance of your stool can be influenced by a variety of factors, including diet, hydration, and potential health issues. In your case, the observation of two distinct colors in your stool—regular brown and a reddish-brown—raises some important questions.

Firstly, the presence of red or reddish-brown stool can indeed be concerning, as it may suggest the presence of blood. Blood in the stool can originate from various sources within the gastrointestinal tract, including the stomach, intestines, or rectum. The color of the blood can provide clues about its source; for instance, bright red blood often indicates bleeding from the lower gastrointestinal tract, such as hemorrhoids or anal fissures, while darker blood may suggest bleeding from higher up in the digestive system.

To determine whether the reddish-brown color in your stool is indeed blood, consider the following factors:
1. Consistency and Texture: Blood in the stool may appear as bright red streaks or mixed throughout the stool. If the reddish-brown color is consistent and does not resemble the typical appearance of blood, it may be due to dietary factors or other non-pathological reasons.

2. Dietary Influences: Certain foods can alter stool color. For example, beets, red food coloring, or even some medications can lead to reddish hues in your stool. If you've consumed any of these recently, it could explain the color change.

3. Accompanying Symptoms: Pay attention to any additional symptoms you may be experiencing, such as abdominal pain, changes in bowel habits, or any signs of discomfort. If you notice any of these symptoms alongside the color change, it may warrant further investigation.

Regarding your question about mucus in the stool, mucus can be a normal component of stool, but an increase in mucus production can indicate irritation or inflammation in the intestines. If you notice a significant amount of mucus or if it is accompanied by other symptoms such as diarrhea or abdominal pain, it would be advisable to consult a healthcare professional.

As for anal fissures, they can indeed cause bleeding, which may appear as dark red blood on the toilet paper or in the stool. Fissures are small tears in the lining of the anus, often caused by passing hard stools. If you suspect you have an anal fissure, you may experience pain during bowel movements, which can further complicate the situation.

In summary, while the presence of reddish-brown stool can be alarming, it is essential to consider dietary factors, the consistency of the stool, and any accompanying symptoms. If you are concerned about the possibility of blood in your stool or if you experience any other troubling symptoms, it is crucial to seek medical attention promptly. A healthcare provider can perform a thorough evaluation, which may include a physical examination, stool tests, or imaging studies, to determine the underlying cause and provide appropriate treatment. Remember, early intervention can be key in addressing potential health issues effectively.

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