A Burning Pain in the Chest? Reflux Esophagitis and Why Your Eating Habits Are on Fire

The insights of Donguibogam align closely with the modern understanding of gastroesophageal reflux disease. This condition occurs when the lower esophageal sphincter between the stomach and esophagus does not close properly, allowing gastric acid or stomach contents to flow back into the esophagus. This causes inflammation and leads to various symptoms, including heartburn, sour regurgitation, a foreign body sensation in throat, and chronic cough. The 'fire in the stomach' described in Donguibogam corresponds well to the inflammatory response and ulcers that develop when the esophageal mucosa is irritated by gastric acid. Gastric acid is strongly acidic; unlike the gastric mucosa, which is built to withstand such an environment, the esophageal mucosa is vulnerable to damage and inflammation upon exposure, producing a burning pain. Over time, this damage can progress to Barrett esophagus, where the esophageal mucosa undergoes structural changes, requiring closer care. The classical view that emotional factors like depressed fire and anger contribute to reflux is also supported by modern neuroendocrinology. Under stress, the body initiates a fight-or-flight response, releasing stress hormones such as cortisol. These hormones can increase gastric acid secretion or loosen the lower esophageal sphincter, making reflux far more likely. Stress also alters vagus nerve activity, suppressing gastrointestinal motility and delaying gastric emptying time, which increases the chance of acid rising into the esophagus. As gastric smooth muscle movement slows, indigestion worsens, creating a repetitive cycle of reflux. Dietary habits—such as consuming greasy and spicy foods, overeating, or eating late at night—further stimulate gastric acid production and slow digestion, keeping the stomach distended for longer periods. This puts sustained pressure on the lower esophageal sphincter, causing it to relax and permitting reflux. Caffeine, alcohol, and nicotine similarly weaken this sphincter. Ultimately, the ancient observations of Donguibogam accurately anticipated how contemporary habits and emotional strain feed the flames of gastroesophageal reflux disease. Alongside medical treatment, adjusting these daily patterns is essential to prevent recurrence and support lasting digestive health.