What causes male urinary problems: frequency, urgency, etc. Treatments?

Broad question. This question is sort of like, 'what does a urologist treat?'. Urinary problems can be cause by enlarged prostates (BPH), prostate cancer, bladder infection, bladder tumor, certain parasites, congenital anomalies of the urinary tract, diabetes insipidus, and many other conditions. Treatments depend on the cause: surgery, certain madications, and dietary habit changes.