Postherpetic Neuralgia

50 to 70% of patients with PHYN experience sleep disorders, and sleep deprivation creates a vicious cycle that lowers the pain threshold. As part of sleep hygiene principles, regular bedtimes and wake-up times, a dark and cool environment (18–20°C), and minimizing nighttime stimuli (light and noise) are recommended. It is also effective to find a position where the affected area does not come into contact with the bed (e.g., lying on the non-affected side in the case of intercostal neuralgia) and to support it with a cushion. Neuropathic pain medications such as amitriptyline and duloxetine are particularly suitable for nocturnal pain because they also have sleep-improving effects. From a Korean medicine perspective, the vicious cycle of sleep and pain is linked to a state of mental and physical instability caused by a weakening of the energy that stabilizes the mind, as well as a state of sleeplessness resulting from a severed energy exchange between the heart and kidneys. When stagnant blood and energy affect the meridians in the chest area, the mind and body lose stability, leading to severe insomnia. At Dongjedang, we address both sleep and pain simultaneously by adding points that stabilize the mind to acupuncture prescriptions for pain treatment and including herbs with sedative and calming properties in herbal medicines tailored to individual constitutions. As sleep improves, the pain threshold rises, accelerating the therapeutic effect.