If You Cannot Manage Anger, Fire Ignites in the Heart

Did the Donguibogam accounts of 'fire' and 'anger trapped in the heart' sound unscientific to you? Remarkably, modern medicine clearly elucidates this ancient wisdom. The anger and stress we encounter in daily life exert a direct impact on our nervous system and endocrine system, driving physical changes across the whole body, including the heart. Strong emotions such as anger or stress activate the brain's amygdala. The amygdala acts like a control tower detecting threats and initiating the fight-or-flight response. When the amygdala is activated, it stimulates the hypothalamic-pituitary-adrenal axis, secreting the stress hormones cortisol and epinephrine. These hormones make the body prepare for emergencies by accelerating the heartbeat, raising blood pressure, and constricting blood vessels to supply blood to muscles. This is a physiological reaction that corresponds exactly to the condition Donguibogam describes as fire surging upward. The problem arises when such reactions recur chronically rather than temporarily. If cortisol levels remain continually elevated, blood glucose becomes unstable, the immune system weakens, and inflammatory responses increase. Adrenaline places sustained strain on the cardiovascular system, potentially raising the risk of hypertension, arteriosclerosis, and heart attack. Chest tightness or palpitations are symptoms appearing when stress hormones act directly upon the heart or when the sympathetic nerve of the autonomic nervous system becomes excessively activated. Furthermore, the brain's prefrontal cortex regulates emotions and makes rational judgments, yet chronic stress and anger can cause hypofunction of this prefrontal cortex. As emotional regulation falters, anger erupts easily, drawing one into a vicious cycle such as intermittent explosive disorder, where once-triggered emotions become hard to restrain. Imbalances in neurotransmitters like serotonin and dopamine are also intimately linked with emotional fluctuations. Chronic stress is not confined merely to heart problems. It influences the digestive system as well, causing gastric hyperacidity, gastritis, and intestinal hypofunction, while lowering immunity to make one vulnerable to various diseases. In addition, as the concept of the gut-brain axis illustrates, recent research reveals that intestinal health influences brain function and emotional states; stress exerts an adverse impact on the gut microbiota environment, negatively affecting our mood and overall health. Ultimately, Donguibogam's emphasis on managing heart fire aligns with modern medicine's warning that anger and stress are not simple emotional matters, but disrupt whole-body balance and can lead to severe diseases.