I've heard so many bad things about pro pecia and Proscar. Side effects of those might outweigh the benefit.

Mine swells up from time to time if I get to heavy on the DHT compounds, specifically Mast or proviron. I was having some issues not too long ago and picked up some 300mg saw palmetto (NOW brand). Started with two (one in the morning and one at night) then switched to just one at night and the issues have gone away. Not sure if it was strictly the saw palmetto that helped, but it's been much better ever since.