Inclusion Criteria:  Present symptoms of urinary frequency and urgency for more than 3 months. With a total score of more than 3 points on the overactive Bladder Symptom Score (OABSS) and a score of more than 2 points on question 3 of OABSS.  Exclusion Criteria:  With other lower urinary tract disorders (e.g. urinary tract infection, bladder outlet obstruction, neurogenic bladder, interstitial cystitis, etc.) With previous pelvic floor surgery or a post-void residual urine volume more than 100 mL. With neurological disease or psychiatric illness. Taking medications affecting lower urinary tract function. With contraindications to acupuncture. Pregnant women.