Hot flashes, also known as hot flushes, are sudden feelings of warmth that spread across the body and last from 1 to 5 minutes. They are a common symptom of menopause, the time when a woman's menstrual periods stop permanently. What causes hot flashes? Hot flashes are caused by decreasing levels of the female hormone estrogen in a woman's body. Estrogen helps regulate body temperature, among other functions. As estrogen levels decline in perimenopause and menopause, the body may not be able to regulate temperature as well as it used to. Fluctuations in estrogen send confusing signals to the brain's thermostat (the hypothalamus), causing it to read "too hot" at times, which triggers hot flashes as the body tries to cool itself down. Things that can trigger hot flash onset during this time include:
- Stress
- Caffeine
- Alcohol
- Spicy foods
- Warm environments
- Sweating
- Chills
- Clammy feeling
- Increased heart rate
- Anxiety
- Feeling faint
- Nausea
- Hormone therapy (HT) - Estrogen with or without progestin
- Prescription medications like antidepressants
- Herbal remedies like black cohosh or soy isoflavones
- Cooling techniques like fans, cold drinks, spray bottles