What causes hot flash?

Most women consider that the declination of the estrogen level is the real cause of hot flash. In some cases, it is entirely substantiated, but not always. No one is completely sure what causes a hot flash. Theories abound, but no one can identify the precise reasons even though various studies have been taking place for years.

A possible cause of hot flash has to do with the individual easiness for changes in temperature. A study shows that women who have a low easiness for temperature changes in the body's core temperature experience up to 50% more hot flashes than a woman who can handle a body temperature change.
During menopause, body's hormones are changing rapidly which could cause the brain to think that a body's temperature is changing. It then causes the nervous system to cool the body down. With this a person may start to sweat, sometime profusely.

In a study, women who can endure the change better have less sweating and only a mild hot flash.