The benign prostatic hyperplasia is a very common disease we are confronted with in the urological clinical practice. An exact anamnesis, a careful interpretation and evaluation of the symptoms and of the (initial) findings are indispensable for an obstructive prostatic hyperplasia to be diagnosed. The diagnostic effort to make an appropriate diagnosis considering as well the pathological process exists mainly of noninvasive methods. Though once the operation is indicated, the spectrum of exploration must be enlarged. Provided that the prostatic hyperplasia is identified as being the clear reason for miction difficulties, an adequate therapy may be applied.