I've got multiple cysts on both sides, but only the right is a persistent problem.
I had to stop wearing boxers... definitely need more support. Even just to walk up stairs.
When I have a flare up, ejaculation definitely makes the problem a lot worse. Warm/hot baths seem to help, along with plenty of enteric-coated aspirin (so you don't aggravate your digestive tract as well).
And if you sleep on your side, put a pillow between your knees/legs.
Wear a jock if there's any chance you'll get sacked. This applies to simple things like having an infant on your lap! One small hit, and it can be weeks to months before it's recovered.
When I'm sure I'm done having kids, I'll have those tubes taken out.