The common causes of urinary diversion are as follows: First, prostatic hyperplasia, when prostatic hyperplasia occurs, the gland hyperplasia protrudes into the urethral cavity, so that the urethral cavity of the tubular structure of the smooth becomes narrow and irregular, the urethra becomes thin at this time there is a urinary effort accompanied by urinary diversion. The diagnosis needs to be carried out ultrasound examination of the urinary system in order to understand whether the prostate hyperplasia, treatment requires oral medication or surgical treatment. Second, urethral stenosis, various causes of urethral stenosis will appear urethral lumen irregularity, then urination can appear urinary effort, urinary diversion. The cause of stenosis may be inflammatory stenosis, may also be stone obstruction, so the treatment needs to remove the cause of stenosis. Third, urinary tract infections can also appear urinary diversion, due to the infection of the urethra appear more secretions, when the secretions out of the body when the scabs dry, sticking to the urethra can cause urinary diversion, or even a sprinkle of urination, and is accompanied by urinary pain, urinary frequency, urinary urgency and other symptoms. This situation requires regular cleaning of the urethral orifice, if necessary, can be used to squeeze the penis, exhaust the urethra residual secretions, and anti-infective treatment, then the urinary divergence can be cured.