Effect of PRP injection at Jiaji point and Ashi point on postherpetic neuralgia

INTERVENTION: Control group, experimental group:PRP was injected into the muscle fascia of a shi acupoint; CONDITION: Postherpetic neuralgia PRIMARY OUTCOME: Numeric Rating Scale (NRS); SECONDARY OUTCOME: PSQI;DLQI;HAMD; INCLUSION CRITERIA: ? Patients who met the above diagnostic criteria and still had pain 3 months after the herpes zoster lesions subsided and were excluded from pain caused by other diseases; ? The age range was 50‐80 years; ? No serious systemic diseases, stable vital signs, no bleeding tendency; ? Willing to receive PRP treatment; ? No treatment was taken for PHN within 1 week; ? Patients who can read and understand by themselves.