Hi,
Regarding hot flashes which I refer to as power surges, I use Evian spray mist. It is plain, distilled water from the Alps (I have been to the lovely town). Used anytime under or over make-up- it keeps our skin moist and helps cool us off. I keep a bottle in every room so I don't forget to use it! Evian has a website, otherwise you can get it at high - end retail stores or by mail. It is not the same stuff as bottled Evian water but the same company.
Good luck,
Mattie