Difference between heartburn and acid reflux
Pro Research Analysisby 
Searched over 200M research papers
Heartburn vs. Acid Reflux: Key Definitions and Symptoms
Heartburn is a burning sensation felt in the center of the chest, often rising toward the throat and neck. It is most commonly described as a painful or uncomfortable feeling behind the breastbone, especially after eating. Heartburn is the most frequent symptom of acid reflux and gastro-oesophageal reflux disease (GORD) Schoor2016Bortoli2014Zhang2020.
Acid reflux, also known as gastro-oesophageal reflux, occurs when stomach acid flows back up into the esophagus. This backflow can cause various symptoms, with heartburn being the most common. Other symptoms may include regurgitation of stomach acid and, in some cases, physical damage to the esophagus Schoor2016Zhang2020.
Relationship Between Heartburn and Acid Reflux
Heartburn is a symptom, while acid reflux is the underlying process. Acid reflux refers to the movement of stomach acid into the esophagus, and heartburn is the burning sensation that results from this acid contact with the esophageal lining Schoor2016Bortoli2014Zhang2020. Not all acid reflux episodes cause heartburn, but frequent heartburn (two to three times a week) may indicate a more serious condition like GORD .
Types and Patterns of Reflux and Heartburn
There are different types of reflux episodes, including acid reflux (with low pH) and weakly acidic or weakly alkaline reflux. Studies show that acid reflux is the main cause of heartburn in non-erosive reflux disease (NERD), while weakly acidic reflux is more common in reflux hypersensitivity and functional heartburn Chen2008Ang2008. The acidity (pH) of the refluxed material plays a key role in whether heartburn is felt; lower pH (more acidic) refluxes are more likely to provoke heartburn symptoms .
Heartburn Frequency and Associated Conditions
People who experience heartburn frequently may have underlying acid reflux disease or GORD. Nighttime heartburn is associated with more frequent and prolonged acid reflux episodes, which can also disturb sleep and reduce quality of life .
Diagnostic Differences
Heartburn can occur in different conditions:
- Non-erosive reflux disease (NERD): Acid reflux is present, but there is no visible damage to the esophagus.
- Reflux hypersensitivity: Patients have normal acid exposure but experience symptoms due to heightened sensitivity.
- Functional heartburn: Symptoms are present without any correlation to acid or non-acid reflux events Chen2008Ang2008.
Conclusion
In summary, acid reflux is the process where stomach acid moves up into the esophagus, while heartburn is the burning sensation that often results from this process. Heartburn is the most common symptom of acid reflux, but not all reflux episodes cause heartburn. The acidity of the reflux and individual sensitivity play important roles in symptom development. Frequent heartburn may indicate a more serious reflux condition and should be evaluated by a healthcare provider Schoor2016Bortoli2014Schoor2016+4 MORE.
Sources and full results
Most relevant research papers on this topic
Heartburn and gastro-oesophageal reflux disease
Heartburn is a common symptom of gastro-oesophageal reflux disease (GORD), a condition in which stomach acid refluxes up the esophageal tract and causes burning, pain, and discomfort in the chest, throat, and neck.
Lower pH values of weakly acidic refluxes as determinants of heartburn perception in gastroesophageal reflux disease patients with normal esophageal acid exposure.
Low pH values of weakly acidic refluxes are a determinant factor in provoking heartburn in gastroesophageal reflux disease patients with normal esophageal acid exposure.
DOI
Heartburn and gastro-oesophageal reflux disease : gastrointestinal tract
Heartburn is a common symptom of gastro-oesophageal reflux disease (GORD), a condition in which stomach acid refluxes up the esophagus and causes burning sensations in the chest, throat, and neck.
Impedance-pH Monitoring for Diagnosis of Reflux Disease: New Perspectives
PSPW index and MNBI are highly accurate in distinguishing reflux-related from reflux-unrelated heartburn, making them a promising addition to impedance-pH monitoring for GERD diagnosis.
Regurgitation is less responsive to acid suppression than heartburn in patients with gastroesophageal reflux disease.
Regurgitation is less responsive to acid suppression than heartburn in patients with gastroesophageal reflux disease, indicating that persistent regurgitation is a common cause of incomplete treatment response.
DOI