Abstract：This paper introduces the clinical experience of chief Chinese medicine physician CHEN Lei applying external therapy to the treatment of postherpetic neuralgia of herpes zoster. In combination with the characteristics of the affected population， the development of the course of disease and symptoms， CHEN puts forward that most patients with postherpetic neuralgia of herpes zoster were in conditions of qi-yin deficiency and qi stagnation and blood stasis；at the same time，due to the different evil qi left in the early and middle stages of herpes zoster，there is the accumulation of dampnessheat and intense liver fire during the sequelae period. External treatment is the main choice，with the principle of reinforcing the healthy qi to supplement the body and dispelling stasis and relieving pain；accurate point selection，needling based on syndrome differentiation， transverse insertion with encircled needling， flexible use of ouch point， the combination of cupping and needling，the method of calming the mind and heart，and other methods can be applied to the treatment of the disease，and the attention should be paid to reinforcing the healthy qi，dispelling stasis and treating secondary syndromes.