Is Your Epigastrium as Hard as a Stone? The Truth About Phlegm Accumulation Disorder, the Hidden Culprit of Chronic Food Retention

Chronic food retention, where the epigastrium hardens like a stone and feels bloated, is often diagnosed in modern medicine as 'functional dyspepsia.' This refers to a state where an endoscope or other tests struggle to find any specific abnormality, yet the patient experiences extreme discomfort. Phlegm accumulation disorder, as discussed in the Donguibogam, contains remarkable insight that explains the deep causes of these functional gastrointestinal disorders. Modern science explains this through an imbalance in the 'gut-brain axis' and nervous system dysfunction. Our stomach is not merely a digestive organ; it possesses a complex neural network so extensive that it is called a 'second brain' in constant communication with the brain. In particular, the vagus nerve acts as a crucial bridge connecting the brain and the digestive system, but when the autonomic nervous system balance is disrupted by stress or irregular lifestyle habits, the activity of this vagus nerve can decrease. Because the vagus nerve regulates intestinal peristalsis and promotes the secretion of gastric acid and digestive enzymes—participating in overall digestive function—a drop in its function inevitably causes food to remain in the stomach longer and delays the digestive process. This directly aligns with 'food stagnation' as described in the Donguibogam. Furthermore, chronic gastrointestinal discomfort can cause low-grade chronic inflammation in the gastrointestinal mucosa. This inflammation makes the sensory nerves of the stomach hypersensitive, leading to 'visceral hypersensitivity,' where one feels excessive pain or discomfort from minor stimuli that normally go unnoticed. This can be the cause of feeling hardness in the epigastrium, as continuous tension and discomfort can contract the diaphragm and abdominal muscles, creating an actual physical stiffness. An imbalance in the gut microbiome also acts as a significant factor. An increase in harmful bacteria raises intestinal mucosal permeability, causing 'leaky gut syndrome,' which leads to a systemic inflammatory response that can further worsen gastrointestinal hypofunction. More than 90% of the neurotransmitter serotonin is produced in the gut; when gut health deteriorates, it affects the secretion of this serotonin, sometimes leading to mental health issues such as mood changes. All these complex factors interact to produce the chronic digestive issue known as 'phlegm accumulation disorder.' Now is the time not to dismiss it as simple indigestion, but to listen to your body's signals.