A worsening of symptoms is a good sign; the problem is to explain this in a comprehensible way. If she never had this before it could be an underlying adrenal issue, and / or hypo Thyroid / low BP. I have had my share of this symptom; it is now gone after Iodine supplementation.
I would recommend real salt and licorice root (for the adrenals), + increase the iodine.
Tell her that Iodine is a beauty treatment; (it is), but one has to go through a detox before she notice.