Occult Blood in Stool: When to Seek Medical Attention - Gastroenterology and Hepatology

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Fecal occult blood


Hello Dr.
Chen, I asked you a question on May 13th.
At that time, I mentioned that there were some red spots in my stool.
However, from May 14th to May 15th, I did not see any blood, but on May 15th, I experienced diarrhea.
I would like to know if I should go to the hospital for an examination only if I continue to see blood, or if there are other symptoms that would warrant a visit? I am very concerned about colorectal cancer.
Additionally, could you advise on how to maintain a healthy gastrointestinal system? I have had digestive issues since childhood.
There are no family history of colorectal cancer symptoms, and my BMI is between 17 and 18, which is considered underweight.
Thank you, doctor.

Lin, 10~19 year old female. Ask Date: 2021/05/15

Dr. Chen Shidian reply Gastroenterology and Hepatology


→ Further observation is possible, or a visit to the clinic for a stool occult blood test.

Reply Date: 2021/05/15

More Info


When it comes to the presence of occult blood in stool, it is essential to understand the potential implications and when to seek medical attention. Occult blood refers to blood that is not visible to the naked eye but can be detected through specific tests. The presence of blood in stool can be a sign of various gastrointestinal issues, ranging from benign conditions to more serious concerns such as colorectal cancer.

In your case, you mentioned that you observed some red in your stool on May 13, but did not see any blood from May 14 to May 15, although you experienced diarrhea on May 15. It is important to note that the occasional presence of blood in stool, especially if it is not persistent, may not necessarily indicate a severe condition. However, there are specific symptoms and situations that warrant immediate medical attention:
1. Persistent Blood in Stool: If you continue to see blood in your stool, it is crucial to seek medical evaluation. Persistent bleeding can indicate underlying issues that need to be addressed.

2. Change in Stool Color: If your stool changes to a dark, tarry color or appears bright red consistently, this could indicate bleeding in the gastrointestinal tract, and you should consult a healthcare provider.

3. Accompanying Symptoms: If you experience additional symptoms such as abdominal pain, cramping, unexplained weight loss, changes in bowel habits (such as prolonged diarrhea or constipation), or fatigue, it is advisable to seek medical attention. These symptoms can be indicative of more serious conditions.

4. Family History: While you mentioned that there is no family history of colorectal cancer, it is still essential to be vigilant about your gastrointestinal health, especially if you have other risk factors or symptoms.

Regarding your concern about maintaining gastrointestinal health, here are some recommendations:
- Diet: A balanced diet rich in fiber can promote healthy digestion. Include plenty of fruits, vegetables, whole grains, and legumes in your diet. Fiber helps regulate bowel movements and can prevent constipation.

- Hydration: Ensure you are drinking enough water throughout the day. Proper hydration is vital for digestive health and can help prevent issues such as constipation.

- Regular Exercise: Physical activity can help stimulate digestion and promote regular bowel movements. Aim for at least 150 minutes of moderate aerobic activity each week.

- Limit Processed Foods: Try to reduce your intake of processed foods, which can be low in fiber and high in unhealthy fats and sugars. These can negatively impact your digestive health.

- Probiotics: Consider incorporating probiotics into your diet, either through supplements or fermented foods like yogurt, kefir, or sauerkraut. Probiotics can help maintain a healthy gut microbiome.

- Regular Check-ups: If you have ongoing gastrointestinal issues or concerns, regular check-ups with a healthcare provider can help monitor your health and catch any potential issues early.

In summary, while occasional blood in stool may not be alarming, persistent bleeding or accompanying symptoms should prompt a visit to a healthcare provider. Maintaining a healthy lifestyle through diet, hydration, exercise, and regular medical check-ups can significantly contribute to your overall gastrointestinal health. If you have any further concerns or if symptoms persist, do not hesitate to seek medical advice.

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