 a need to urinate frequently, especially at night
 difficulty starting urination or holding back urine
 inability to urinate
 weak or interrupted flow of urine

If prostate cancer develops and is not treated, it can cause these symptoms:

 painful or burning urination
 difficulty in having an erection
 painful ejaculation
 blood in urine or semen
 pain or stiffness in the lower back, hips, or upper thighs