Inclusion Criteria:  meet the diagnostic criteria the results of detection of morphine in urine is negative the patients must be conscious, with no aphasia, no intellectual disability, and graduate from primary school so they can understand what the scale mean and cooperate the treatment. not involved in any clinical trials in 3 months sign the Informed Consent Form  Exclusion Criteria:  with any injury or infection around the acupoint the patients are intolerant or allergic to acupuncture or electro-acupuncture the women is pregnant or lactating patients whose heart, liver or kidney with severe impairment according to the judgement from investigators, patients don't correspond with this research