Hot flashes are the most defining symptom of perimenopause and menopause. They are caused by declining and erratic estradiol disrupting the hypothalamic temperature setpoint. They are highly treatable. They are also massively undertreated, for two decades after the WHI study mis-scared an entire generation of women off HRT.
As ovarian production drops, the hypothalamus loses its estradiol-buffered temperature stability. Result: vasomotor surges.
Removal of ovaries causes abrupt estradiol crash, often producing severe hot flashes within days.
Both hyperthyroidism and hypothyroidism can produce flushing and night sweats. Always check TSH before assuming menopause.
SSRIs, certain antidepressants, hormone-blocking cancer treatments, and others can mimic.
Persistent flushing with other systemic symptoms warrants ruling out these rare causes.
Modern HRT (transdermal estradiol patch or gel + nightly micronized progesterone) resolves hot flashes for most women within weeks.
See full details →Find My Protocol routes you to the right panel and the right physician for this symptom, in 5 minutes.