Reference
Hot Flash
A hot flash is a sudden wave of heat, often centered on the face, neck, and chest, that can bring flushing and sweating. Episodes are brief but can recur throughout the day.
Hot flashes are strongly associated with the hormonal shifts of menopause and the years leading up to it. During an episode, blood vessels near the skin widen and sweating may follow as the body sheds a perceived surge of heat. They can occur day or night, and nighttime episodes overlap with night sweats. Frequency and intensity vary widely, and their impact on comfort and sleep can be significant. An episode usually builds quickly, peaks, and then fades within minutes. Because they stem from changes in the body's temperature control, they are grouped with other vasomotor experiences. Some people also feel their heart race or a flush of color during the wave. Triggers like warm rooms, stress, or certain foods can sometimes set one off. Their sudden, self-limited nature is part of what makes them recognizable.
A hot flash is a sudden wave of heat, often centered on the face, neck, and chest, that can bring flushing and sweating. Episodes are brief but can recur throughout the day.
What hot flash means
Hot flashes are strongly associated with the hormonal shifts of menopause and the years leading up to it. During an episode, blood vessels near the skin widen and sweating may follow as the body sheds a perceived surge of heat. They can occur day or night, and nighttime episodes overlap with night sweats. Frequency and intensity vary widely, and their impact on comfort and sleep can be significant. An episode usually builds quickly, peaks, and then fades within minutes. Because they stem from changes in the body's temperature control, they are grouped with other vasomotor experiences. Some people also feel their heart race or a flush of color during the wave. Triggers like warm rooms, stress, or certain foods can sometimes set one off. Their sudden, self-limited nature is part of what makes them recognizable.
In practice
A sudden warmth rising up the neck and face, followed by a light sweat, that passes within minutes is a typical hot flash. The same episode occurring during sleep can wake a person with damp skin, which is where hot flashes and night sweats meet. Feeling one come on in a warm meeting room, then fade as quickly as it arrived, is a familiar daytime version.
Frequently asked questions
What triggers a hot flash?
They are closely tied to hormonal changes. Warmth, stress, or certain foods can sometimes set an individual episode off as well.
How long does a hot flash last?
Usually just a few minutes. The wave of heat builds, peaks, and then fades, sometimes leaving a light sweat behind.
Sources & further reading
Reputable organizations with more on sweating and related topics. Offered for further reading and general education, not as citations for any specific claim on this page.
General educational information about sweating. Not medical advice, and not a substitute for diagnosis or treatment by a qualified healthcare professional.