The cause of the female urethral syndrome has previously been obscure, as it has been associated by definition with a lack of objective findings but a plethora of subjective complaints of retropubic pressure, dyspareunia, urinary frequency, and dysuria. There is now strong evidence that the microscopic paraurethral glands connected to the distal third of the urethra in the prevaginal space are homologous to the prostate. They stain histologically for prostate-specific antigen and, like the prostate, are subject to both infection and cancer. The most important aspect of recognizing this microscopic "female prostate" as an anatomic feature is that its infections may completely explain many cases of the urethral syndrome. Further, the diagnosis is not elusive if trained clinicians palpate for localized and objective paraurethral tenderness through the anterior vagina wall to one or both sides of the urethra. Treatment parallel to that for male prostatitis is usually rewarded by the elimination of symptoms and the objective finding of the loss of tenderness of the paraurethral glands. As with prostatitis, the localized problem often recurs. It is time to alert primary care physicians to this disorder and to eliminate the widespread practice of treating affected women with either invasive urethral dilation or tranquilizers.