I don't know about the cysts, etc., but when I first started having hot flashes the Dr. put me on HRT. It was awful. I almost bled to death. I wasn't having hot flashes and sweats any more but I was so anaemic from the heavy bleeds that I was exhausted all the time. I stopped taking them and went the "natural" way which helped a lot.During the time that I was on HRT I cried at the drop of a hat, had terrible mood swings and awful dreams...Yuk, never again!Luilu