Postherpetic Neuralgia

Allodynia in PHYN is a neuropathic symptom characterized by a pain response to normal stimuli—light contact, wind, and temperature changes—and is caused by hypersensitization of damaged A-delta and C fibers. Cold air and wind stimulate cold receptors (TRPM8) and mechanoreceptors, triggering allodynia. The management principles are: ① Stimulus blockage: protection with soft cotton materials; ② Temperature maintenance: application of warm pads (low intensity); ③ Pressure avoidance: prohibition of tight clothing and belts. Lidocaine patches (5%) are a topical preparation that is directly effective for abnormal pain. Korean Medicine Clinic Perspective

In Korean medicine, the worsening of pain due to cold wind is viewed as cold energy invading already weakened meridians, exacerbating blockages in Qi and blood. Since meridians with stagnant blood are particularly vulnerable to cold and strong external energies, keeping warm is not merely a matter of convenience but an integral part of the treatment. At Dongjedang, we use acupuncture techniques that provide warm stimulation to open up the circulation of Qi and blood by applying thermal stimulation to meridians imbued with cold energy, and we also provide guidelines for maintaining warmth during treatment. For occupations involving significant outdoor exposure, such as delivery work, we design treatment intervals and protective methods with greater precision.