Totally personal, and I think it also matters whether you are able to go thru menopause naturally or thrust into it by hysterectomy or radiation/chemo or some other hormonal shock.

I had a hysterectomy a little over 9 years ago and started having flashes about 3 years ago. I go thru periods when they are very infrequent, but they certainly haven't stopped. I'm taking compounded progesterone and I also take a supplement that includes black cohosh both of which I believe help, but I still have flashes, and I've lost 40+ lbs. in the last almost 2 years. I'm 47 and had the hysterectomy because of endometriosis.

For me they seem to go in phases. I finished with Peri about two years ago, and have noticed I get more of them now if I am stressed.