You may consult an urologist if you have problems such as:

Urinary tract infection, kidney stones and bladder infections
Painful urination
Male infertility problems, such as low sperm count and sperm abnormalities.
Erectile dysfunction or ejaculatory problems
Blood in the urine or Hematuria which could be an early sign of a bladder or kidney cancer.
An increase in PSA levels or a change in PSA, the most sensitive indicator of prostate cancer.
Any abnormality such as small nodules or irregularities in the prostrate
Any defect or abnormality of the kidney revealed by your X-ray/ USG/CT Scan.
A testicular mass or continuous pain in testicles.
Erections problems and men's health issues.