Causes of recurrent heartburn
Pro Research Analysisby 
Searched over 200M research papers
Common Causes of Recurrent Heartburn
Gastroesophageal Reflux Disease (GERD) and Reflux Mechanisms
Recurrent heartburn is most often linked to gastroesophageal reflux disease (GERD), where stomach acid frequently comes into contact with the esophagus. This is not usually due to too much acid, but rather a combination of factors such as decreased lower esophageal sphincter (LES) pressure, the presence of a hiatus hernia, poor esophageal and gastric clearance, and a weakened esophageal mucosal barrier. These issues allow acid to move up from the stomach into the esophagus, causing the burning sensation known as heartburn 24.
Esophageal Hypersensitivity and Functional Heartburn
A significant number of people with recurrent heartburn have normal endoscopy and pH monitoring results. In these cases, the main cause is often esophageal hypersensitivity, where the esophagus is more sensitive to normal amounts of acid or even mechanical stimuli. This can lead to heartburn symptoms even when acid exposure is not excessive. Both non-erosive reflux disease (NERD) and functional heartburn are common in these patients, with symptoms driven by heightened sensitivity rather than actual reflux damage 13.
Structural and Functional Abnormalities
Other contributing factors include structural problems like a hiatus hernia, which allows part of the stomach to push through the diaphragm, and functional issues such as reduced clearance of acid from the esophagus. These problems can make it easier for acid to irritate the esophagus and cause recurrent symptoms 24.
Persistent Heartburn Despite Treatment
Some individuals continue to experience recurrent heartburn even with optimized medical therapy, such as proton pump inhibitors. In these cases, underlying causes may include persistent reflux, esophageal hypersensitivity, or rare conditions like ectopic sebaceous glands in the esophagus, which may be linked to reflux esophagitis .
Conclusion
Recurrent heartburn is most commonly caused by GERD-related mechanisms, esophageal hypersensitivity, and structural or functional abnormalities of the esophagus. In many cases, the problem is not excessive acid, but rather the esophagus’s increased sensitivity or impaired ability to clear acid. Understanding these causes is important for choosing the right treatment and improving quality of life for those affected 1234+1 MORE.
Sources and full results
Most relevant research papers on this topic
Taking the ‘sauer’ out of sauerkraut: a rapid update on the pathophysiology and treatment of gastro-oesophageal reflux disease
GERD is not caused by excessive gastric acid, but rather a combination of factors, including decreased lower oesophageal sphincter pressure, hiatus hernia, reduced oesophageal and gastric clearance, and compromised oesophageal mucos
DOI
Untangling Non-erosive Reflux Disease From Functional Heartburn.
Non-erosive reflux disease (NERD) and functional heartburn are common causes of refractory heartburn, and diagnosis requires endoscopy and reflux testing.
DOI