Afraid to Shake Hands? Say Goodbye to Palmoplantar Hyperhidrosis

Modern medicine primarily diagnoses excessive sweating of the hands and feet as primary focal hyperhidrosis, a condition in which sweat is excessively secreted only in specific areas such as the palms, soles, or underarms without an underlying systemic disease. The core mechanism behind this is sympathetic hyperactivity. The autonomic nervous system unconsciously regulates essential life functions, including thermoregulation, blood pressure, and digestion. This system is largely divided into the sympathetic nerve and the parasympathetic nerve. The sympathetic nerve is activated during times of tension and stress, while the parasympathetic nerve takes over during relaxation and rest. Individuals with palmoplantar hyperhidrosis often experience a hypersensitivity reaction of the sympathetic nerve in response to stress, tension, anxiety, or sometimes with no apparent trigger at all. When the sympathetic nerve becomes overly active, it triggers an excessive release of the neurotransmitter acetylcholine, which stimulates the eccrine sweat glands to produce heavy sweating. It is as if the body sounds an emergency alarm and produces sweat even when no real emergency exists. Research indicates that this sympathetic hypersensitivity reaction may also involve genetic factors. When a parent has hyperhidrosis, their children are more likely to experience it as well. Environmental factors, dietary habits, and psychological stress can also contribute to sympathetic stimulation. From a modern medical perspective, the concept of damp-heat in Donguibogam can be interpreted as a metaphor not just for simple heat and moisture, but for systemic metabolic imbalance, low-grade inflammatory responses, and a state of nervous system hyperactivation brought on by stress. An internal imbalance where the body retains heat and metabolic waste ultimately prompts a sympathetic hypersensitivity reaction, leading to persistently clammy hands and feet. Understanding these mechanisms through modern science helps bring clarity and direction to managing the condition.