How can modern science explain the weakness of defensive qi described in the Donguibogam? In modern medicine, hyperhidrosis due to qi deficiency can be understood as a form of generalized hyperhidrosis, closely tied to imbalances in the autonomic nervous system and the endocrine system. Sweat secretion in the body is primarily regulated by the sympathetic nerves within the autonomic nervous system. Sweating during stress or tension is a common example. In an exhausted state such as hyperhidrosis due to qi deficiency, these sympathetic nerves can become overly active, reacting excessively. It is similar to an internal alarm system becoming hypersensitive and sounding off at minor triggers.
Furthermore, chronic fatigue and stress affect the endocrine system, including the hypothalamic-pituitary-adrenal axis. This axis regulates the release of cortisol, the stress hormone, and a chronic decline in vitality can impair its regulatory capacity, disrupting autonomic nervous system balance. Like an exhausted battery that malfunctions because it cannot charge properly, this imbalance can abnormally activate the sweat glands and increase sweat output.
In addition, hypofunction of mitochondria, the core of energy metabolism, is an important factor. Weak defensive qi also indicates that the body's cells are failing to generate sufficient energy. When mitochondrial function declines, internal energy production decreases, weakening the regulatory capacity of the autonomic nervous system and affecting thermoregulation. Because the body cannot produce adequate energy, it perceives an ongoing emergency state and enters a cycle of expending more energy through unnecessary sweating. As a result, core body temperature may rise slightly, or the brain may mistake conditions for an increase in body temperature and signal for excessive sweat secretion.
When sweat is secreted in excess, the body loses not only water but also essential electrolytes, including sodium, potassium, and magnesium. These electrolytes are critical for fundamental biological functions, such as neurotransmission, muscle contraction, and fluid balance. A disruption in this balance can cause severe fatigue, lethargy, muscle spasm, and dizziness. This offers scientific support for the decreased physical stamina and lack of energy reported by patients with hyperhidrosis due to qi deficiency.
From a modern medical standpoint, hyperhidrosis due to qi deficiency can be understood as a combined result of sympathetic overactivation, endocrine system dysfunction, reduced cellular energy metabolism, and subsequent electrolyte imbalance. For this reason, care should focus not simply on suppressing sweat, but on restoring fundamental energy and re-establishing autonomic nervous system balance. If these symptoms continue, consulting a qualified professional to identify the underlying cause and pursue appropriate care is recommended.
