I had night sweats out of the blue (or red) 20 years after I had a hysterectomy. My doctor put me through a round of tests for every living thing, including Carcinoid Syndrome, and nothing showed up. I take .25 mg. of Estradiol every evening and they’re gone, hallelujah. My endocrinologist says it also builds bones; I’m just happy to be able to be flash-free all day and sleep all night. 🙂