Hot flashes are one of the most common symptoms women experience during perimenopause and menopause. For some women, they feel like a mild wave of warmth. For others, they can be sudden, intense, and disruptive to sleep, confidence, work, and everyday life.

Research suggests that up to 75% of women experience hot flashes during the menopausal transition. Understanding what causes hot flashes and why they happen may help women feel more informed and supported during hormonal changes.

What Is a Hot Flash?

A hot flash is a sudden sensation of heat that spreads through the upper body, particularly the face, neck, and chest.

Hot flashes often happen unexpectedly and may last anywhere from 30 seconds to several minutes.

Common hot flash symptoms may include:

• Sudden warmth or overheating
• Sweating
• Flushed or red skin
• Increased heart rate
• Chills afterwards
• Anxiety or discomfort
• Night sweats during sleep

Some women experience occasional hot flashes, while others may experience symptoms multiple times throughout the day and night.

What Causes Hot Flashes?

Hot flashes are closely linked to hormonal fluctuations, particularly declining oestrogen levels during perimenopause and menopause.

Estrogen plays an important role in regulating the body’s temperature control system, which is managed by the hypothalamus, the area of the brain responsible for maintaining stable body temperature.

As estrogen levels fluctuate, the hypothalamus may become more sensitive to even small changes in body temperature. Researchers believe this narrows what is known as the thermoneutral zone, meaning the body reacts more quickly to slight increases in heat.

When this happens, the brain may mistakenly believe the body is overheating and activate cooling mechanisms, including:

• Dilating blood vessels near the skin
• Increasing heart rate
• Triggering sweating

This sudden response creates the sensation of a hot flash.

Research also suggests neurotransmitters such as serotonin and norepinephrine may play a role in temperature regulation, which may help explain why stress, anxiety, and mood changes can influence hot flash symptoms.

Why Do Hot Flashes Feel Worse at Night?

Night sweats are essentially hot flashes that happen during sleep.

Hormonal fluctuations combined with changes in cortisol, melatonin, and body temperature rhythms may make symptoms feel more noticeable at night.

Poor sleep may also increase stress hormone activity, creating a cycle where night sweats disrupt sleep, and sleep deprivation may worsen symptoms further.

When Do Hot Flashes Start?

Many women associate hot flashes with menopause itself, but they often begin during perimenopause, the transition phase leading up to menopause.

Perimenopause can begin several years before periods stop completely. During this time, hormone levels may fluctuate unpredictably, which can trigger symptoms such as:

• Hot flashes
• Mood swings
• Irregular periods
• Sleep disturbances
• Brain fog
• Fatigue

For some women, hot flashes may continue for several years after menopause.

Common Hot Flash Triggers

Although hormonal changes are the primary cause of hot flashes, certain lifestyle and environmental factors may worsen symptoms.

Stress and Anxiety

Stress activates the nervous system and increases cortisol levels, which may contribute to temperature sensitivity and symptom intensity.

Caffeine and Alcohol

Caffeine and alcohol may dilate blood vessels and influence nervous system activity, potentially triggering hot flashes in some women.

Spicy Foods

Spicy foods naturally raise body temperature and may worsen symptoms for some individuals.

Warm Environments

Heat, humidity, hot showers, or overheated rooms may trigger symptoms more easily when the body’s temperature regulation system is already sensitive.

Poor Sleep

Sleep deprivation may increase stress hormone activity and reduce the body’s resilience to hormonal fluctuations.

Smoking

Research suggests smoking may be associated with an increased risk of more severe menopausal symptoms, including hot flashes.

Natural Ways to Support Hot Flashes

Every woman’s experience is different, and there is no one-size-fits-all approach. However, certain lifestyle habits may help support comfort and overall wellbeing during hormonal transitions.

Prioritise Stress Management

Chronic stress may worsen menopausal symptoms by influencing cortisol and nervous system activity.

Supportive stress-management practices may include:

• Deep breathing
• Gentle exercise
• Yoga
• Meditation
• Spending time outdoors
• Journaling
• Mindfulness practices

Research suggests relaxation-based techniques may help support emotional wellbeing during menopause.

Focus on Sleep Quality

Sleep and hot flashes are closely connected. Creating a calming bedtime routine may help support deeper and more restorative sleep.

Helpful sleep habits may include:

• Maintaining a regular sleep schedule
• Reducing screen time before bed
• Keeping the bedroom cool
• Avoiding caffeine late in the day
• Creating relaxing evening rituals

Many women also include calming wellness products such as ANNA’S Magnesium Bedtime Lotion as part of their nighttime self-care routine.

Dress for Comfort

Breathable fabrics, layered clothing, and cooling bedding may help women feel more comfortable during temperature fluctuations and night sweats.

Support Overall Hormonal Wellbeing

Balanced nutrition, hydration, regular movement, stress management, and nervous system support may all play a role in supporting overall hormonal wellbeing during perimenopause and menopause.

Some women also choose to incorporate wellness products such as ANNA’S Wild Yam Cream into their self-care routines during this stage of life.

Frequently Asked Questions About Hot Flashes

Are hot flashes normal during perimenopause?

Yes. Hot flashes are one of the most common symptoms experienced during perimenopause and menopause due to changing hormone levels.

How long do hot flashes last?

Hot flashes may last anywhere from 30 seconds to several minutes. Some women experience symptoms for a few months, while others may experience them for several years.

What triggers hot flashes?

Common triggers may include stress, caffeine, alcohol, spicy foods, warm environments, poor sleep, and hormonal fluctuations.

Why are hot flashes worse at night?

Night sweats may feel worse due to hormonal changes, disrupted temperature regulation, elevated cortisol, and sleep disturbances.

When should I seek professional support?

Severe or persistent symptoms affecting sleep, mental wellbeing, or quality of life should always be discussed with a qualified healthcare professional.

Final Thoughts

Hot flashes are a very real physiological response linked to hormonal fluctuations and the body’s temperature regulation system.

While they are extremely common during perimenopause and menopause, understanding the science behind hot flashes may help women feel more informed, reassured, and supported during this stage of life.

Small lifestyle changes, calming routines, stress management, and prioritising sleep may all help support overall wellbeing during hormonal transitions.

 

Disclaimer: This article contains general health information for educational purposes only and should not be taken as personalised medical advice. Always consult with a qualified healthcare professional before making changes to your health, diet, or treatment plan.