Rarely, hot flashes and nights sweats are caused by something other than menopause. When the hypothalamus thinks your body is too warm, it starts a chain of events - a hot flash - to cool you down. But most research suggests that hot flashes occur when decreased estrogen levels cause your body's thermostat (hypothalamus) to become more sensitive to slight changes in body temperature. It's not clear exactly how hormonal changes cause hot flashes. Hot flashes are most commonly caused by changing hormone levels before, during and after menopause. If hot flashes affect your daily activities or nighttime sleep, consider seeing your doctor to discuss treatment options. Some women have them for more than 10 years. On average, hot flash symptoms persist for more than seven years. How often hot flashes occur varies among women, but most women who report having hot flashes experience them daily.
Nighttime hot flashes (night sweats) may wake you from sleep and can cause long-term sleep disruptions. They can happen at any time of day or night. Hot flashes may be mild or so intense that they disrupt daily activities. A single episode may last a minute or two - or as long as 5 minutes. The frequency and intensity of hot flashes vary among women.
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