The concept of 'phlegm-fluid' in the Donguibogam shows an astonishingly close parallel to modern medicine's understanding of chronic pain syndromes, including 'fibromyalgia.' Beyond the simple metaphor of 'turbid water in the body,' we can now understand through what scientific mechanisms this 'phlegm-fluid' troubles us.
First, 'phlegm-fluid' is closely tied to chronic low-grade inflammation. Stress, gut imbalances such as leaky gut syndrome, Westernized diets high in processed foods and sugar, and environmental toxins induce continuous inflammatory reactions in our bodies. This chronic low-grade inflammation elevates inflammatory markers in the blood, such as C-reactive protein and cytokines, and lowers our pain threshold, making us feel severe pain from even minor stimuli. The Korean medicine perspective that phlegm-fluid obstructs the circulation of qi and blood can be interpreted as waste accumulation resulting from stagnant circulation of blood and lymph, which in turn leads to localized microinflammatory responses.
Second, hypersensitivity reactions of the nervous system, specifically 'central sensitization,' are the core mechanism of fibromyalgia. This is a phenomenon where the brain and spinal cord excessively amplify pain signals, caused by continuous stress and inflammatory responses altering the brain's pain regulation circuitry. An imbalance in neurotransmitters involved in pain modulation, such as serotonin, norepinephrine, and dopamine, plays a major role here. The concept that 'phlegm-fluid' coagulates throughout the body, obstructing the circulation of qi and blood and irritating nerves, can be viewed as an insight from Korean medicine explaining this central sensitization phenomenon.
Third, reduced sleep quality and chronic fatigue are also crucial links. Patients with fibromyalgia often exhibit brain wave abnormalities, known as alpha-delta sleep, during deep slow-wave sleep. This means that pain modulation and recovery processes during sleep do not occur properly. Sleep deprivation creates a vicious cycle that raises inflammatory markers and worsens pain. The Donguibogam's explanation that 'phlegm-fluid' makes the body heavy and stiff, thereby disturbing deep sleep, accurately foresaw the connection between sleep disorders and pain in modern medicine.
Fourth, autonomic nervous system imbalance cannot be overlooked. When one is vulnerable to stress and the sympathetic nerve is hyperactivated, blood vessels constrict and muscles tense up, aggravating pain. Recovery and relaxation become difficult because parasympathetic activation fails to occur properly. The fact that 'phlegm-fluid' described in the Donguibogam tends to worsen with stress and tension directly aligns with this autonomic nervous system dysregulation.
In conclusion, 'phlegm-fluid' in the Donguibogam extends far beyond simple sputum or edema. It can be seen as a comprehensive concept encompassing the complex pathophysiology of fibromyalgia explained by modern medicine, including chronic low-grade inflammation, nervous system hypersensitivity reactions, sleep disorders, and autonomic nervous system imbalance. It contains profound wisdom for the holistic recovery of our bodies.
