Effect of acupuncture on pain

INTERVENTION: Acupuncture Group: Electroacupuncture Intervention 1: Acupuncture Group: Electroacupuncture. Intervention 2: Sham Acupuncture: Connect electrode and immediately dissconnect it. Sham Acupuncture: Connect electrode and immediately dissconnect it. CONDITION: Inguinal hernia. ; Unilateral or unspecified inguinal hernia, without obstruction or gangrene Unilateral or unspecified inguinal hernia, without obstruction or gangrene PRIMARY OUTCOME: Pain. Timepoint: After surgery. Method of measurement: Visual Analogous Scale(VAS). INCLUSION CRITERIA: INCLUSION CRITERIA: patients candidate for inguinal hernia surgery and age between 20 to 60 years old. Exclusion criteria: addiction to opiods and using medications for pain relief.