Chances are you might not be able to pronounce prostatitis, let alone know the nature of this ailment that sends millions of men to their doctor each year. The most common urinary tract problem to hit men ages 50 and younger, prostatitis involves inflammation and swelling of the prostate gland and leads to a host of problems, such as pain during urination or ejaculation, tenderness in the groin and flu-like symptoms. Another part of the "fun"? Prostatitis isn't just one disease but a group of four separate conditions with no magic bullet cure-all in sight.

We wanted to know more, so we went straight to an expert: David Yao, M.D., a Santa Monica, California–based urologist who works in the UCLA Health system. Yao has been an attending urologist since 2011 and specializes in vasectomies, benign prostatic hyperplasia (BPH), hematuria and prostate-specific antigen (PSA) blood tests for prostate