I don't recall seeing any posts about no longer needing treatment, that's not possible for this condition, its for life. You stop the treatment and the symptoms will return.
I have said I am symptom free on my daily regime, that is until the next flare up. When that happens I increase my dose until I am symptom free again.
Just a thought, are you referring to the women who take high doses of systemic HRT and no longer need topical treatment?
It doesn't take much to cause a flare and stress will certainly be a trigger, unless perhaps you have another condition like thrush occurring.