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Body temperatures during menopausal hot flashes.

Journal of Applied Physiology

|March 1, 1975

Summary

This summary is machine-generated.

Hot flashes in menopause cause a drop in core body temperature and a rise in peripheral temperatures like fingers and toes. Dabbing cheeks with cold water provided relief from thermal distress.

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Area of Science:

Physiology
Menopause Research

Background:

Hot flashes are a common symptom of menopause.
The physiological mechanisms underlying hot flashes are not fully understood.

Purpose of the Study:

To investigate the body's thermal and cardiovascular responses during hot flashes.
To explore potential triggers and relief methods for hot flashes.

Main Methods:

Continuous monitoring of body temperatures (rectal, vaginal, tympanic, skin, finger, toe) in a menopausal woman.
Measurement of heart rate and electrocardiogram (ECG) during hot flashes.
Observation of skin temperature changes and sweating patterns.

Main Results:

Core body temperatures decreased after hot flashes, with the lowest recorded at 35.2°C (tympanic).

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Peripheral temperatures (fingers, toes) showed a sharp increase at flash onset, while cheek temperatures rose slightly.

Heart rate increased at the onset of a hot flash, followed by a decrease.

Conclusions:

Hot flashes involve complex thermoregulatory and cardiovascular changes, not solely a rise in body heat.
Vascular warming in the cheeks may contribute to the sensation of thermal distress.
External cooling of the cheeks offered immediate relief, suggesting a localized vascular component.