The Most Common Perimenopause Symptom Is Not Hot Flashes
"I don't think it's hormones. I'm just tired."
“I don’t know what’s wrong with me, I’m always so tired.”
I hear some version of these statements almost every week. From women who run teams, businesses and households. Women who are sharp, capable, and used to being the one who holds it all together.
They're not having hot flashes so they assume perimenopause hasn't started yet. They put the exhaustion down to a busy season, a big year, too much on their plate.
New research says it might be something else entirely.
Researchers at Mayo Clinic, working with the women's health app Flo, surveyed 17,494 women in 158 countries. The results were published in January 2026 in Menopause, the journal of The Menopause Society. It's believed to be the largest study of its kind.
They asked two simple questions.
What do you think perimenopause looks like?
What are you actually experiencing?
When asked which symptoms they linked to perimenopause, women most often named hot flashes (71%), sleep problems (68%) and weight gain (65%).
But among women over 35 who said they were in perimenopause, the most common symptoms were:
• Physical and mental exhaustion: 95%
• Fatigue: 93%
• Irritability: 91%
• Sleep problems: 89%
• Low mood: 88%
• Brain fog: 87%
Hot flashes? 75%. Common, yes, but not the headline.
Across all 12,000+ women over 35 in the study, hot flashes didn't even make the top five. Fatigue, exhaustion, irritability, low mood, sleep problems, digestive issues and anxiety all came first.
The researchers described it as a mismatch between what women expect and what they actually go through and it’s probably the biggest reason so many of us are struggling without knowing why.
If you're waiting for a hot flash to tell you something's changing, you could be waiting a long time. Meanwhile you're dragging through the afternoon, snapping at the people you love, and lying awake at 3am wondering why.
Exhaustion is easy to explain away. You're busy, stressed, you're getting older. Every woman you know is tired. So you try the obvious fixes. Earlier nights, more coffee, then less coffee, a new supplement, a different workout. And nothing really changes and this isn’t because you’re doing anything wrong, it’s because no one has looked at the whole picture yet.
The study made a useful distinction. Fatigue is physical tiredness. Exhaustion is deeper. It’s slower performance, memory slips, trouble concentrating, forgetfulness. That's the word you lose mid-sentence in a meeting, the reason you walked into the kitchen, gone.
The researchers point to fluctuating estrogen as one piece of it. Those shifts can affect how your nervous system regulates itself, throw off your body clock, and make your sleep less restorative. You can spend eight hours in bed and still wake up drained.
As a holistic nutritionist, I also look at the things that quietly amplify it in midlife:
• Blood sugar. Energy crashes, cravings and irritability often travel together.
• Nourishment. What fuelled you at 35 may not support you now.
• Stress load. Your capacity to recover from stress changes in midlife.
• Sleep quality. Not just how long you sleep, but how well.
The study also noted that caregiving (we are in the sandwich generation) and other health conditions can add to the strain. For a lot of women, that's the full picture: a changing body carrying the same, or bigger, load as before.
What I've seen from over 15 years of working with women is that exhaustion is physical first, but it's rarely only physical. It's also what happens when you've been running on empty for a long time. When you've been the strong one, the capable one, the one everyone leans on. When your own needs have been quietly sliding to the bottom of the list for years.
Midlife has a way of making that impossible to ignore and your body stops letting you override it.
The irritability is what happens when there's nothing left in the gas tank. And it's often the first sign that something needs to change, not just in your diet or your routine, but in how you're truly living your life.
The good news is that this is also where things can turn. When you support your body and start making room for yourself again, the energy comes back, the patience comes back and you start to feel like you again.
The first step isn't another fix. It's noticing what's actually going on. Ask yourself:
• Do I wake up tired, even after a full night in bed?
• Do I hit a wall in the afternoon most days?
• Am I more snappy with people than I used to be?
• Am I losing words, names or my train of thought more often?
• Have I tried the usual fixes and still don't feel like myself?
If you said yes to more than one, it's worth taking seriously. Not as something to push through, but as information.
You don't need a hot flash to get support and you don't have to figure this out on your own.
I'm a Registered Holistic Nutritionist with more than 15 years of experience supporting women through midlife. I look at your body, your energy, your stress and the way you've been carrying it all and how all of that is affecting you.
My Midlife & Nutrition Assessment is one focused session. We look at what's driving your exhaustion, and you leave knowing exactly what to change first. No guesswork, no starting from scratch on your own.
The woman with energy at 6pm is still there. Let's find her.
Were you waiting for the hot flash too? I know I was.
Mel x
Sources
• Global study identifies gap between expectations, experience in perimenopause (Mayo Clinic News Network)
• Early menopause symptoms might not be what most women expect (HealthDay via MedicineNet)
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