Mike,
  I had combined radiation therapy (IMRT in Dec/JaN followed a month
later by seeds Feb20).  Both therapys produced a burning sensation on
urination that continues now that I am 6-7 weeks out.  The burning,
which is not that painful, was more consistent in the month after
seeds.  At this point, it is becoming increasingly less frequent.  I
suppose that, over the coming months, it will slowly go away.  I would
like to know what others experienced on this.
  There are a couple of good drugs that your urologist or radiation
oncologist can prescribe that may help with starting urination and the
burning.  One is called Flomax and I highly recommend you ask for it
if they are not volunteering it. A friend of mine who also had our
problem got another drug that he says worked well for him.  I doubt
yours will go away in a few days.
  It is my guess that the burning is caused by the urethra being
inflammed and irritated by the radiation.  And, when the radiation
reaches its third halflife the urethra will continue to be inflammed
for weeks or months ago as it slowly heals.  Ibuprofen has also been a
big help for some patients having had radiation therapy.
Jack
Sarasota

Serious burning can be a symptom of a urinary tract infection.
It might be a good idea to inform your doctor about it if you haven't
already.  If it is an infection, it may be easily treatable with
antibiotics.

For self-care, I think people often recommend lots of
liquids, and cranberry juice - but even that is something
that a doctor would be vastly more qualified than I to advise
you about.