Red Stool: Causes and Concerns for Your Digestive Health - Surgery

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It is not just blood streaks, but rather the entire stool is almost red?


I usually eat one meal a day, around 8 PM.
Recently, I have started to experience noticeable bloating and a sensation of "gastritis" after eating, and sometimes I feel like vomiting, with instances of vomiting 5 or 6 times in one night.
I have severe constipation; I once took four laxatives from a clinic and didn’t even pass gas, so I have been relying on enemas for daily bowel movements.
For the past two weeks, I have been having bright red stools almost every day.
They do not resemble blood-stained stools; rather, the entire stool is red, with no brown or dark yellow coloration at all.
However, I do not have diarrhea or abdominal pain, just occasional nausea.
It is not related to food, as I eat a simple diet and have had red stools even on days when I did not consume any red foods.
I would like to know what might be causing this.

Miss Lin, 30~39 year old female. Ask Date: 2017/05/12

Dr. Yu Mingchang reply Surgery


Hello: Please take some time to visit the colorectal department for a colonoscopy.
The Ministry of Health and Welfare Changhua Hospital cares about you.

Reply Date: 2017/05/12

More Info


Understanding the causes of red stool can be a source of concern for many individuals, especially when it deviates from the norm. The color of stool is primarily influenced by what we eat, but it can also indicate underlying health issues. In your case, experiencing red stool consistently over two weeks, without accompanying symptoms like diarrhea or abdominal pain, raises some important considerations.

Firstly, it is essential to differentiate between stool that is red due to dietary factors and stool that may indicate bleeding in the gastrointestinal tract. Red stool can sometimes result from consuming certain foods, such as beets, red gelatin, or foods with red dye. However, you mentioned that you have not consumed any red foods on the days you experienced red stool, which suggests that dietary causes may not be the primary factor in your situation.

Another potential cause of red stool could be the presence of blood. However, you noted that the stool does not appear to have the characteristics of blood, which typically presents as dark red or maroon, especially if it originates from the lower gastrointestinal tract. Bright red blood usually indicates bleeding from the rectum or lower colon, often associated with hemorrhoids or anal fissures. Since you have not experienced any pain or other symptoms, this may be less likely.

Given your history of severe constipation and the use of laxatives, it is also important to consider how these factors may affect your digestive health. Chronic constipation can lead to various complications, including fecal impaction, which may cause changes in stool color and consistency. Additionally, the use of laxatives, especially if used frequently, can disrupt the normal function of your intestines and lead to further gastrointestinal issues.

In your case, the red color of your stool could also be indicative of a condition known as "carcinoid syndrome," which is associated with carcinoid tumors that can secrete hormones affecting bowel function. However, this is relatively rare and would typically present with other symptoms, such as flushing or diarrhea.

It is crucial to consult a healthcare professional, preferably a gastroenterologist, to evaluate your symptoms further. They may recommend diagnostic tests, such as a stool analysis, blood tests, or imaging studies, to rule out any serious conditions. It is also advisable to keep a food diary to track your diet and any correlations with your stool color.

In the meantime, addressing your constipation is vital. Increasing your fiber intake through fruits, vegetables, and whole grains, along with adequate hydration, can help improve bowel regularity. Regular physical activity can also promote digestive health. If you continue to experience issues, your doctor may suggest alternative treatments for constipation that are less harsh than over-the-counter laxatives.

In summary, while red stool can be alarming, it is essential to consider various factors, including diet, gastrointestinal health, and potential underlying conditions. Seeking medical advice is the best course of action to ensure your digestive health is properly assessed and managed.

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