Can perimenopause cause anxiety?

The short answer

Yes. Anxiety that feels new, arrives without an obvious trigger, and does not match your usual temperament is commonly reported in perimenopause. Fluctuating oestrogen affects serotonin and noradrenaline regulation directly. It is not a character change.

Medically reviewed by Michelle Okafor

PhD, Licensed Clinical Psychologist

Reviewed 20 August 2026
Updated 29 August 2026

The fuller picture

The word women use most often is new. Not worse, new. Anxiety that has no object, that arrives in the body first as a racing heart or a tight chest, and that does not match how you have handled things your whole life.
The perimenopausal window carries a genuinely increased risk of depression, including in women who have never had a depressive episode before. That is a well-replicated finding rather than an impression.
It often arrives with early waking, which then makes it worse, which then makes the sleep worse. Untangling which came first is less useful than treating both.

What else could cause this

Assuming everything in midlife is hormonal is how other things get missed. These are the ones worth ruling out.

Thyroid dysfunction

An overactive thyroid produces almost identical symptoms: racing heart, heat intolerance, tremor, poor sleep. A blood test separates them, and it is worth doing.

A primary anxiety disorder

Present most days for six months or more, tied to specific worries, and usually with a history stretching back before your late thirties.

Alcohol or caffeine load

Both raise baseline anxiety, and tolerance for both often falls in midlife. Worth two weeks of honest observation before concluding anything.

Iron deficiency or anaemia

Common where periods have become heavy. Palpitations, breathlessness on stairs, and exhaustion that sleep does not touch.

There is a particular sentence women say, almost word for word, and it is worth quoting because recognising it is half the point of this page.

“I have never been an anxious person.”

That is the tell. Not the severity, the unfamiliarity. Anxiety that has been with you since your twenties is a known quantity, however unpleasant. Anxiety that arrives at forty-three, in a person who has spent two decades being the calm one in a crisis, is a change, and changes have causes.

Why it happens

Oestrogen is not only a reproductive hormone. It modulates serotonin availability and noradrenaline regulation in the brain directly, which is why the steep fluctuations of perimenopause, rather than the eventual low level, are what correlate most strongly with mood symptoms. It is the variability that does it. That also explains why so many women describe good weeks and terrible weeks rather than a steady decline.

What this page is not saying

It is not saying that every difficult feeling in your forties is hormonal. Your forties are frequently a decade of genuinely hard things: ageing parents, teenagers, career ceilings, marriages that are either working or not. Those are real, and treating them as a hormone problem is its own kind of dismissal.

What it is saying is that if the feeling does not match the circumstances, if the intensity is out of proportion, or if it arrives in the body before it arrives in your thoughts, then hormones belong on the list of things being considered. For a great many women they have never once been mentioned.

What to do next

Name it accurately when you ask for help. New anxiety in a forty-four year old with disrupted periods and broken sleep is a different presentation from lifelong anxiety, and saying so changes the consultation.
Ask for thyroid function and a full blood count before you accept any explanation, hormonal or psychological.
If it is affecting your work, your relationships or your ability to function, that is a reason to speak to someone now rather than a reason to push through.

Speak to someone rather than reading on if

You feel hopeless, or that the people around you would be better off without you
Panic symptoms are stopping you leaving the house or driving
You are drinking more in order to manage it