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When You Have Indigestion, Are 'Carbonated Drinks' Really Okay?
Blog August 26, 2025

When You Have Indigestion, Are 'Carbonated Drinks' Really Okay?

Dr. Yeonseung Choe
Dr. Yeonseung Choe
Chief Director

Feeling Bloated? A Sip of Cola Can Bring a Burp and Relief.

CASE STUDY

Mr. B, a professional in his 30s, often experienced bloating after meals. His chosen solution was carbonated drinks. This was because they immediately caused him to burp, relieving the discomfort. However, after a few weeks, his heartburn worsened every night, and he began waking up in the early hours with a burning sensation in his chest.

How Carbonated Drinks Work

Carbonated drinks rapidly increase gas in the stomach, inducing gastric distension. This distension triggers burping, which can momentarily relieve the feeling of being blocked. This is why it often feels like an "instant remedy."

However, the same mechanism can lead to other problems. When the stomach distends, some individuals experience a decrease in Lower Esophageal Sphincter (LES) pressure. Simultaneously, gastric acid secretion is promoted, making gastroesophageal reflux more likely. Consequently, while there might be immediate comfort after burping, heartburn and reflux symptoms can worsen over time.

This phenomenon is similar to forcefully blasting open a blocked drainpipe with carbonation to momentarily clear it. While the flow temporarily improves, if the "piping" (mucosa and sphincter) is weakened by repeated irritation, even small stimuli can easily trigger reflux. In other words, carbonation might be an emergency button, but it's not a solution.

Terminology Explanation

Lower Esophageal Sphincter (LES): A muscular ring between the esophagus and the stomach. Normally, it remains closed to prevent stomach acid from refluxing, opening only momentarily when swallowing. If its pressure decreases, stomach contents can easily flow back into the esophagus.

When Is It Helpful, and When Is It Harmful?

The pattern holds a clue. If discomfort is most severe immediately after a meal and you feel immediate relief after burping, then "distension due to gas retention" might be the primary indicator. On the other hand, if you repeatedly experience heartburn that worsens when lying down, a burning sensation in your throat, or the feeling of sour fluid rising, then carbonated drinks are likely to be a factor in worsening your symptoms.

In terms of Traditional Korean Medicine, carbonation temporarily "disperses" blocked Qi, relieving discomfort (gas resolution), but frequent use can weaken the root of stomach Qi (the digestive function of the Spleen and Stomach), creating a foundation for reflux and heartburn.

The same holds true in the model of modern medicine. This is because there's a push-and-pull dynamic between the short-term benefits of "distension → burping" and the long-term costs of "LES weakening and gastric acid stimulation."

Key Takeaways

  • Carbonated drinks can temporarily relieve bloating by inducing burping.
  • Conversely, they can worsen heartburn and reflux by decreasing LES pressure and increasing gastric acid secretion.
  • If you have GERD (Gastroesophageal Reflux Disease) or if symptoms worsen at night, it is safer to reduce carbonated drink intake.
  • If an "emergency button" is needed, limit yourself to a small amount of unsweetened sparkling water 1-2 hours after a meal, but avoid frequent reliance.

Caution (Contraindications)

Carbonated drinks can worsen symptoms if you suffer from GERD, stomach ulcers, or severe gastroesophageal reflux during pregnancy. In such cases, consider alternatives like antacids (e.g., Gelfos), non-carbonated warm water, or a small amount of ginger tea. This article provides general information and is not intended as medical advice for specific individuals.

Self-Check

Finally, check for yourself. Jot down the following three points and observe for just one week to reveal a pattern.

  1. Time and amount of carbonated drink consumed
  2. Changes in symptoms (bloating/burping/heartburn)
  3. Bedtime and nighttime symptoms

If nighttime symptoms increase, it is highly likely that carbonation is an unfavorable signal for your stomach.

Are you also repeating the pattern of "discomfort after meals → carbonation → relief → nighttime heartburn"? Starting today, prioritize fundamental strategies such as controlling eating speed, avoiding overeating, and stopping late-night snacks, instead of relying on the "emergency button."

Clinic Information

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Dr. Yeonseung Choe

Dr. Yeonseung Choe Chief Director

I have met many patients who came after visiting multiple medical institutions and departments for persistent or recurrent conditions. Symptoms normally handled by different specialties—such as abdominal pain, headaches, palpitations, dizziness, and insomnia—may overlap in one person. Sometimes there is no clear improvement despite taking medication for each symptom, and being unwell gradually becomes part of daily life. In these cases, I look beyond individual diagnoses and examine how the symptoms connect and change together. Asking only about the most uncomfortable symptom today does not reveal the full course. I look at when the body first began to change and what happened after illness, surgery, childbirth, or starting and stopping medication. I also review changes in weight, diet, and sleep, then trace which symptoms improved with previous treatment and which remained. Test results, diagnoses, and the course of previous treatment are important for understanding the current condition. Clinical research in modern Korean medicine, physiological and pathological research in modern medicine, and observations recorded in classical Korean medicine texts offer different perspectives on the same body. Rather than fitting a patient into one perspective, I consider what each can and cannot explain and look for clues that connect symptoms and treatment histories that were previously considered separately.

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