What Is the Weird Feeling Right Before a Hot Flash?

Many women describe a strange sensation just before a hot flash begins. This pre-flash feeling, sometimes called an aura, can serve as an early warning system. Understanding this sensation can help you prepare and respond more effectively.

What the Pre-Flash Sensation Feels Like

Women describe the pre-flash feeling in various ways. Some experience a sudden sense of warmth or pressure in the chest or abdomen. Others feel a wave of anxiety, a fluttering sensation, or a feeling that something is about to happen.

Some women describe it as an electrical feeling, a tingling sensation, or a moment of lightheadedness. Others notice a change in their heart rate — it may speed up slightly or feel irregular for a moment.

This sensation typically occurs seconds to a minute before the hot flash itself. For some women, it is very subtle and easy to miss, while for others it is a clear and unmistakable signal.

Why It Happens

The pre-flash sensation is thought to be related to the neurological changes that trigger hot flashes. When the hypothalamus — the brain's temperature regulator — detects what it perceives as a rise in body temperature, it initiates a cascade of responses.

Blood vessels begin to dilate to release heat, which causes the flushing and sweating associated with hot flashes. The pre-flash sensation may be your body's initial response to this neurological signal, before the full heat and sweating begin.

Changes in heart rate and the feeling of anxiety or pressure are likely related to the sudden activation of the cardiovascular system as blood vessels dilate. This can create a brief surge in blood flow that you feel as an aura.

Using the Pre-Flash Sensation to Your Advantage

If you can identify your personal pre-flash sensation, you can use it as an early warning to take action before the hot flash fully develops. The moment you feel the aura, try removing a layer of clothing, reaching for cold water, or beginning slow deep breathing.

Acting during the pre-flash phase may not stop the hot flash entirely, but it can reduce its intensity and duration. You are essentially getting a head start on cooling down before the full heat wave hits.

Tracking these sensations alongside your hot flashes in a symptom diary can help you identify patterns. Over time, you may become more attuned to the early signals your body sends.

When the Sensation Is Concerning

While the pre-flash sensation is normal, certain symptoms warrant medical attention. If you experience chest pain, severe dizziness, fainting, or irregular heartbeats that are not associated with hot flashes, these should be evaluated by a healthcare provider.

Some conditions, including thyroid disorders, anxiety disorders, and cardiovascular conditions, can cause sensations similar to the pre-flash feeling. If you are unsure whether what you are experiencing is related to hot flashes, a healthcare provider can help.

Most pre-flash sensations are harmless and simply part of the hot flash experience. But trusting your instincts and seeking evaluation when something feels different or concerning is always appropriate.

When to Talk to a Healthcare Provider

Understanding your body's signals during perimenopause can help you manage symptoms more effectively. Visit EOS Health to connect with a clinician who can provide personalized guidance.

Glossary

Pre-Flash Aura: A sensation that some women experience seconds to a minute before a hot flash begins, which may include warmth, pressure, anxiety, or tingling.

Hypothalamus: The part of the brain that regulates body temperature. Its sensitivity to temperature changes during perimenopause triggers hot flashes.

Vasodilation: The widening of blood vessels that causes the flushing and heat of a hot flash. The pre-flash sensation may be related to the beginning of this process.

Vasomotor Symptoms: The medical term for hot flashes and night sweats, caused by hormonal changes affecting blood vessel and neurological function.