These flushes and things sure seem to have improved my singing voice--not only the quality of the tone, but the health of my vocal chords, my ability to clearly hear and sing the correct pitch, my ability to sing dynamically, and my freedom of expression. Either these things have improved, or my PERCEPTION of what is going on has improved. Can't really say for sure...I don't generally sit around with a tape recorder analyzing myself....
I do know that I used to go for months at a time feeling like my vocal chords were swollen, but now, even after practicing rigorously for an extended length of time, my chords don't actually feel swollen anymore. I think it is a result of the improvement of my allergies. Praise the Lord--My Healer!