Prostatitis is inflammation of the prostate gland, which can be caused by a bacterial infection, though in many cases the cause is not understood. Prostatitis is classified into four major types. There is acute bacterial prostatitis which occurs when there is a sudden often severe infection of the prostate that's caused by bacteria. There is also chronic bacterial prostatitis characterized by a bacterial recurring or persistent infection. The third type is chronic pelvic pain syndrome characterized by chronic pain and discomfort in the pelvic area without signs of infection. Last but not least, there is asymptomatic inflammatory prostatitis, which is an inflammation of the prostate that typically presents with no symptoms. Treatment depends on the type and can include medications like antibiotics, anti-inflammatory drugs, and alpha-blockers.