Clinical, morphological and pathophysiological factors of influence on the occurrence of pre- and postoperative dysfunction of the bladder as a result of benign prostatic hyperplasia have been studied. According to the obtained data, there was no statistical difference between the surgical treatment method in this patients, because the percentage of unsatisfactory results was statistically inaccurate in the groups. That is, the operating method is not an essential factor determining the preservation of dysuria in postoperative period. The analysis revealed significant prognostic significance in maintaining the postoperative unsatisfactory result of such factors as age, body mass index, presence of urinary tract infection, duration of bladder drainage before the operation, and factors such as prostate, bladder and residual urine volume, according to the data of the study, have no significant effect on postoperative bladder dysfunction.