Still Tired No Matter How Much You Rest? The Reality of Chronic Fatigue Syndrome

In modern medicine, concepts similar to consumptive disease in the Donguibogam are described as chronic fatigue syndrome or myalgic encephalomyelitis/chronic fatigue syndrome. This condition can be diagnosed when extreme fatigue that is not relieved by sleep or rest persists for more than six months and causes significant disruption to daily life. Far from being a matter of laziness or personal attitude, it is a complex condition where multiple physiological systems become dysregulated. A primary factor is mitochondrial dysfunction. Because these cellular energy engines cannot generate energy properly, the entire body remains in a persistent state of power shortage. Dysfunction of the hypothalamic-pituitary-adrenal axis, which regulates the stress response, is another major contributor. When chronic stress causes hyperactivation of the HPA axis until it becomes depleted, the body cannot respond effectively to stress and remains constantly tired. This leads to an imbalance in cortisol, promoting inflammatory responses and reducing immunity. Neurologically, people often experience cognitive decline, impaired concentration, and memory impairment, commonly referred to as brain fog. These symptoms are linked to neuroinflammation and reduced activity in specific brain areas such as the frontal lobe. Imbalances in neurotransmitters regulating pain, including serotonin and dopamine, can also trigger generalized myalgia, joint pain, and headache. In addition, autonomic nervous system imbalance is commonly observed, bringing symptoms like orthostatic hypotension, palpitations, and indigestion. From an immunological standpoint, research shows that the immune system may remain abnormally activated after viral infections such as the Epstein-Barr virus or cytomegalovirus, or the activity of innate immune cells like natural killer cells may decline. These immune abnormalities foster a chronic inflammatory state and elevate pro-inflammatory cytokines, creating a cycle that intensifies fatigue, muscle pain, and low mood. Chronic fatigue syndrome is not ordinary tiredness resolved by rest alone, but an interconnected dysfunction across the nervous system, endocrine system, and immune system.