a hot flush is one of the more well known signs of perimenopause, though how it feels can vary a great deal from person to person. some people experience a mild, occasional warmth, while others find flushes frequent, intense, and genuinely disruptive.
what is actually happening
a hot flush is thought to be linked to fluctuating oestrogen levels affecting the part of the brain that regulates body temperature, known as the hypothalamus. as oestrogen shifts, your internal thermostat can become more sensitive, misreading normal body temperature as too warm and triggering a rapid cooling response: a sudden feeling of heat, flushed skin, and sweating, sometimes followed by chills.
daytime flushes and night sweats
when hot flushes happen at night, they are often called night sweats, and they can disrupt sleep considerably, which in turn can affect mood and energy the next day. this is one reason hot flushes and sleep difficulties are so often mentioned together during perimenopause.
common triggers people notice
- warm rooms or heavy bedding
- alcohol and caffeine
- spicy food
- stress and anxiety
- smoking
triggers vary a lot between individuals, so it can be worth keeping a simple note of when your flushes happen to see if a pattern emerges.
practical steps that may help
dressing in layers that are easy to remove, keeping a cool drink nearby, using a fan, and choosing breathable fabrics like cotton for clothing and bedding are all simple, low effort steps many people find useful. some people also find that regular movement, maintaining a healthy weight, and managing stress through relaxation techniques or gentle exercise can make a difference to how often or how intensely flushes are noticed, though everyone responds differently.
nutrition and hot flushes
a generally balanced diet, staying well hydrated, and noticing whether particular foods or drinks seem to trigger flushes for you can all be worthwhile. some people include seed cycling as part of a broader, varied diet during this time, but it is important to be clear that seed cycling is not a treatment for hot flushes and the evidence for any direct effect is very limited. it is best viewed simply as one general nutritional habit alongside everything else, not a solution on its own.
you are not overreacting
hot flushes that happen frequently or intensely are genuinely tiring and can affect concentration, confidence, and sleep. it is a real, physiological symptom, not something to simply push through without support if it is affecting your life.
when to speak with a gp
if hot flushes are frequent, severe, or disrupting your sleep or daily life, do speak with a gp. they can talk through what is happening and discuss the full range of evidence based options, including hrt, which is often effective for this particular symptom.