No they are a common symptom of peri as oestrogen begins to decline. The hot flushes are thought to occur as the body tries to get the ovaries to release an egg. This is why FSH level also rises as it is a follicle stimulating hormone. The higher the level the further into meno you are. It was the drenching hot sweats every 20 minutes day and night during peri which made me turn to HRT.
Taz x