Inclusion Criteria:  pain located in the pudendal nerve distribution area pain intensity increases in the sitting position; no nocturnal pain symptoms; pain with no objective sensory impairment pain is relieved by diagnostic pudendal the pain symptom is associated with sexual dysfunction, with the elimination of obstetrical and gynaecologic, urological and anorectal diseases in the related departments and absence of any physical and mental disorders; treatment by other departments is invalid; patients should be older than 18 years patients should be able to sign an informed consent form  Exclusion Criteria:  patients have simple tailbone, gluteus muscle or lower abdominal pain, or only paroxysmal pain, or only pruritic symptoms, and/or have imaging anomalies that may explain the symptoms; female patients who are pregnant; patients who take anticoagulant drugs or have any coagulation disorder; patients who are unable to complete the questionnaire; patients with pain, which is caused by malignant or autoimmune diseases and patients who are hypersensitive to metals.