What are the causes of prostatitis?

Although it may be acquired through sexual contact, often prostatitis develops for no apparent reason.  Most cases of prostatitis are the result of a bacterial infection. Some sexually transmitted infections can increase the risk of developing bacterial prostatitis. Unprotected sexual intercourse can let bacteria into the urethra, which can travel up to the prostate. Other cases of bacterial prostatitis can be caused when the muscles of the pelvis or bladder do not work properly and urine flows back into the urethra and enters the prostate, causing infection or inflammation. In older men with enlarged prostates, infections may occur because of failure to empty all urine from the bladder.

Is there a link between prostatitis and prostate cancer?

Studies have suggested that for men with long-term prostatitis, there could be a relationship with prostate cancer.  Although a definite link has not been shown, men with long-term prostatitis should have regular prostate checks.