I have heard that acupuncture can treat an overactive bladder. Is there any proof? Any studies?

Acupuncture is very effective at treating overactive bladder. A study at the Oregon Health and Science University showed significant improvement in overactive bladder when treated with acupuncture.

Approximately 17 percent of American men and women suffer from overactive bladder and spend an estimated $20 billion on products to manage the condition. But research published in Obstetrics & Gynecology indicates that acupuncture may be a more effective treatment.

Researchers at the Oregon Health and Science University found that four weekly acupuncture sessions showed significant improvement in bladder control, frequency of urination, and the urgent need to urinate as compared to the control group, which received sham acupuncture as a placebo.

Source: Medscape Medical News, 2005