Very likely, the Urologist will prescribe a medication, such as Avodart, since the symptoms are severe enough to impact his quality of life. He might also try
Saw Palmetto, which is available online, and at any health food store. I know folks who take this, and claim it works very well.
One other reason for him to see a Urologist is that it could just be an enlarged prostate, but it could be more serious.