Green Stool and Acid Reflux: What You Need to Know - Gastroenterology and Hepatology

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Green stool followed by a coated tongue with a bluish tint?


I am 30 years old, and two days ago I noticed issues with acid reflux and a bit of bloating.
I constantly feel a burning sensation in my throat.
Today, I discovered that my stool has changed to green and is more like diarrhea.
What could be the cause of this?

Mr. Zeng, 30~39 year old female. Ask Date: 2022/07/14

Dr. Zhang Kebin reply Gastroenterology and Hepatology


Hello Mr.
Zeng, you may continue to monitor your condition.
If you experience persistent discomfort, please seek medical attention from a hepatobiliary and gastroenterology specialist.
Thank you.

Reply Date: 2022/07/14

More Info


Green stool and acid reflux can be concerning symptoms, especially when they appear together. Let's break down what might be happening in your case.

Firstly, green stool can result from a variety of factors. One common cause is the consumption of certain foods, particularly those high in chlorophyll, such as leafy greens (spinach, kale) or foods with green food coloring. However, if your diet hasn’t changed significantly, other factors could be at play.
Another potential cause of green stool is rapid transit through the intestines. When food moves too quickly through the digestive tract, bile (which is green) doesn’t have enough time to break down completely, resulting in green-colored stool. This can occur due to diarrhea, which you mentioned experiencing. Diarrhea can be triggered by infections (viral or bacterial), food intolerances, or even stress.

Regarding your acid reflux symptoms, which include a burning sensation in the throat and a feeling of bloating, these can be linked to dietary choices, lifestyle factors, or underlying gastrointestinal conditions. Acid reflux occurs when stomach acid flows back into the esophagus, causing irritation. Common triggers include spicy foods, fatty foods, caffeine, and alcohol. Stress and obesity can also exacerbate acid reflux symptoms.

The combination of green stool and acid reflux could suggest a gastrointestinal disturbance. If your body is reacting to something you ate, it could lead to both symptoms. For instance, if you consumed a large amount of high-fiber foods suddenly, it could cause bloating and diarrhea, resulting in green stool. Alternatively, if you have an infection or a foodborne illness, this could also explain both symptoms.

It’s essential to monitor your symptoms closely. If the green stool persists for more than a couple of days, or if you experience additional symptoms such as severe abdominal pain, fever, or blood in your stool, it’s crucial to seek medical attention. These could be signs of a more serious condition that requires treatment.

In the meantime, consider the following recommendations to help manage your symptoms:
1. Dietary Adjustments: Keep a food diary to track what you eat and how it affects your symptoms. Avoid known triggers for acid reflux, such as spicy or fatty foods, and consider reducing caffeine and alcohol intake.

2. Hydration: Ensure you are drinking enough fluids, especially water, to help with digestion and prevent dehydration from diarrhea.

3. Smaller Meals: Eating smaller, more frequent meals can help reduce the pressure on your stomach and minimize acid reflux.

4. Elevate Your Head While Sleeping: If you experience nighttime reflux, try elevating the head of your bed to prevent acid from flowing back into the esophagus.

5. Consult a Healthcare Professional: If symptoms persist or worsen, consult a healthcare provider for a thorough evaluation. They may recommend tests to rule out infections, food intolerances, or other gastrointestinal disorders.

In summary, while green stool and acid reflux can be alarming, they often have manageable causes. By paying attention to your diet and symptoms, you can take steps to alleviate discomfort. However, do not hesitate to seek medical advice if your symptoms do not improve or if you have any concerns about your health.

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