Women Health: Menopause
Most women report that they experience hot flashes during pre- and perimenopause. Hot flashes typically begin to occur when women start to have irregular periods, and usually end one or two years after menstruation has ceased. Sometimes women will experience flushing or warmth in their faces and upper bodies, others might actually have sweating and chills. Hot flashes can occur at any time of day or night. While it is not entirely clear what causes hot flashes, some researchers suggest it might have to do with mixed signals from the hypothalamus, a region in the brain that regulates body temperature and sex hormones. The hypothalamus may be reacting to decreasing levels of estrogen, and this may explain why hot flashes cease when estrogen replacement is given.
There are two tests that your doctor can perform that will determine if a woman is "officially" in menopause. One is to test the follicle-stimulating hormone (FSH) level. This hormone increases significantly after the ovaries shut down. Another procedure is to take a Pap-like smear from the vaginal walls and check for any thinning and drying out of the vagina.