Why do you always want to urinate but urinate very little?

Why do you always want to urinate but urinate very little? There is a desire to urinate, but the amount of urine is not much, urinate very little, this situation is more common in chronic prostatitis, chronic prostatitis is a very common disease in adolescent males. Due to the presence of inflammation of the prostate, it causes frequent urination and urgency symptoms. Due to the stimulation of the bladder by the prostate, it is easy to cause frequent urination. Urinary bladder has a small amount of urine, there is urine, urine will be discharged, so each time the urine volume will be very small, but the number of urination increased, this is often said to frequent micturition. Prostatitis is mainly due to urinary tract infection, infected urine caused by bacterial prostatitis, or sterile urine in the urinary tract pressure is too high when entering the prostate, causing sterile inflammation of the prostate. Whether bacterial prostatitis or aseptic prostatitis, will cause frequent micturition symptoms, so that the number of patients urinating increased, but urine volume decreased.