There are various types of prostatitis, one of which is prostatodynia (or Prostadynia). Sometimes called noninflammatory chronic pelvic pain syndrome, it is the occurrence of prostatitis symptoms, without inflammation or bacterial infection. Currently, the National Institute of Health refers to Prostatodynia as Category IIIb.
Doctors understand very little about why some people - often young, otherwise healthy men - develop this problem. Theories to explain prostatodynia include an abnormal buildup of pressure in the urinary tract, irritation resulting from an autoimmune or chemical process, or pain generated in the nerves and muscles within the pelvis. There may be a link between prostatodynia and increased stress, because this condition is often found in men with "Type A" personalities in high-stress situations.
The main symptom is pain in the pelvis or perineum (the area between the scrotum and the anus.) However, many of the nonbacterial prostatitis symptoms may be present, such as fever, pain in the lower back, pain in genital area, general body aches, burning or pain on urination, increased urinary frequency, urgency, pain or discomfort during or after ejaculation, decreased libido, and occasionally visible blood in the urine.