I missed it too. Perimenopause Anxiety, Mood Changes, and Rage

Why Perimenopause Can Make You Feel Like a Different Person

Part 1: What Is Actually Happening and Why

Have you ever found yourself thinking,"What is wrong with me?" Maybe you've noticed you're more anxious than you've ever been. You're snapping at your partner over something that normally wouldn't bother you. You feel overwhelmed by things you've handled for years. Maybe you just don't feel like yourself anymore, and you can't quite explain why. I want to tell you that if this sounds familiar, you are definitely not alone. Women often tell me they feel like they've changed so drastically and have become a different person. They wonder if they're burned out, depressed, or simply not coping as well as they used to. For many women, these changes to anxiety, mood changes, and rage are the earliest signs of perimenopause.

I missed it too.

Looking back now, I can clearly see that I was experiencing anxiety during my own perimenopause. I also had something I never expected or wanted to admit and that was rage. My rage was not what I thought it was. Little things suddenly felt enormous, my patience disappeared, and I felt overwhelmed more easily than I ever had.

At the time, though, I blamed it all on life stress. I had plenty of reasons to feel anxious, so it never occurred to me that my hormones might also be playing a role. The irony of all of this was that I am a nurse practitioner and was immersed in the medical environment each and every day. Yet, there was no discussion of midlife hormones, perimenopause and menopause. I honestly thought menopause was for much older women than me. If I missed it, then it's no surprise that so many women do too. One of the biggest misconceptions about perimenopause is that it's all about hot flashes and irregular periods. Those symptoms can definitely show up but for many women, the first changes happen first in the brain. 

What is actually happening in your brain

To understand why mood changes so dramatically during this transition, you have to understand what estrogen and progesterone are actually doing in the brain. Most people think of these as reproductive hormones. They are so much more than that.

Estrogen is a whole body hormone and one of the most powerful neuromodulators in the human body. It influences the production, release, and sensitivity of multiple neurotransmitter systems all at the same time. Here is what shifts as estrogen starts to fluctuate and decline during perimenopause:

Serotonin is your primary mood-stabilizing neurotransmitter. Estrogen supports serotonin synthesis, regulates its receptors, and slows its breakdown. As estrogen fluctuates during perimenopause, serotonin levels become less stable, which is why many women suddenly feel more anxious, more emotionally reactive, or more prone to low mood, sometimes dramatically so, even when nothing in their life has obviously changed.

Dopamine drives motivation, focus, and the ability to feel pleasure and reward. Declining estrogen reduces dopamine activity, contributing to low drive, poor concentration, emotional flatness, and irritability. This is part of why so many perimenopausal women describe feeling like they have lost their spark or their enthusiasm for things they used to love.

Glutamate is the brain's primary excitatory neurotransmitter, essential for mood, energy, and cognition. Estrogen supports glutamate receptor function. A brain imaging study found that glutamate levels in the prefrontal cortex, an area central to mood regulation and decision-making, were significantly lower in perimenopausal women compared to premenopausal women of similar age, and that this decrease may contribute to the increased risk of depression during the transition. This is early but meaningful research that helps explain the cognitive and emotional flatness so many women describe.

Cortisol, your primary stress hormone, tends to rise during the menopause transition, particularly at night. Estrogen normally helps modulate the stress response. As it declines, the HPA axis, your body's stress regulation system, becomes less well-regulated. The result is a nervous system that is more reactive to stressors that would previously have been manageable, and a body that stays in a higher state of arousal. This is not anxiety disorder. This is a dysregulated stress response driven by hormonal change.

Progesterone matters too.

Progesterone is not just a reproductive hormone. It is a neurosteroid, meaning it has direct and powerful effects on the brain. When progesterone is present in the body, it converts into a compound called allopregnanolone. Allopregnanolone acts on GABA-A receptors, the same receptors targeted by anti-anxiety medications like benzodiazepines, and it has potent calming, anti-anxiety, and sleep-promoting effects.

During perimenopause, progesterone levels often decline before estrogen does, and they decline more sharply. As progesterone drops, allopregnanolone also drops. The result is a direct weakening of the brain's inhibitory system, increasing neuronal excitability and promoting anxiety, emotional reactivity, and sleep disruption. This is a documented neurochemical mechanism that explains why so many women experience a sudden and surprising increase in anxiety during perimenopause, often before they have any other symptoms they would recognize as hormonal.

Real life stress.

Most women don't go through perimenopause in a quiet season of life. They're building careers, leading businesses, taking care of aging parents, raising teenagers or helping adult children, supporting spouses, etc. Midlife is often one of the busiest, most stressful chapters of a woman's life. Research suggests that these psychosocial stressors, and possibly the hormonal changes of perimenopause itself can alter the body's stress response. Scientists are still working to understand exactly how menopause affects cortisol, our primary stress hormone, but many women notice that their ability to cope with stress changes during this transition.  You have more stress coming in and at the very same time, your brain is adapting to major hormonal changes. It's no wonder your stress tolerance feels different.

One area of research I find especially interesting comes from Dr. Lisa Mosconi's team at Weill Cornell Medicine. Using advanced brain imaging, her group has found evidence suggesting that certain parts of the brain may actually increase estrogen receptor density during the menopause transition. Researchers think this could be one way the brain tries to adapt to fluctuating hormone levels. Science is still evolving, and we don't have all the answers yet. However, the idea that the brain is actively remodeling itself during this transition is very interesting.

What does this actually look like?

One of the first questions women ask me is, "How do I know if what I'm feeling is perimenopause?" There is not one answer, because every woman experiences this transition differently. Some women feel more anxious, others become more irritable, some struggle with depression. Sometimes, it's all of those things at once. One thing I wish more women knew is that these symptoms don't mean you're "handling life poorly." Like I said above, many of the women I see are incredibly capable. They're the women who have always held everything together and then they find themselves struggling with anxiety, mood changes, and rage during perimenopause. It often means their brain is adapting to one of the biggest hormonal transitions it will ever experience.

Let's talk about anxiety first.

Some women have never struggled with anxiety before, while others have a history of anxiety but suddenly feel like it's harder to control. It isn't always panic attacks. It can sound like: "My mind never shuts off." "I can't stop worrying." "Everything feels overwhelming." "I feel like I'm constantly on edge." "I'm exhausted, but I can't relax." Perimenopausal anxiety often doesn't look like anxiety caused by a specific event.

Research tells us that women are at increased risk for new-onset anxiety and depression during the menopause transition, likely because fluctuating hormones affect the same brain pathways involved in mood regulation.

Depression isn't always what people expect.

When most people think about depression, they picture someone crying all day or unable to get out of bed. That can be true but sometimes it can look like losing interest in things you used to enjoy, feeling emotionally flat, not looking forward to anything, and having less energy. Sometimes women tell me, "Nothing is necessarily wrong...I just feel blah.”

If the difficult days consistently begin to outnumber the good days, week after week, it's a good time to talk with your healthcare provider. That doesn't necessarily mean hormones are the only answer, and it doesn't automatically mean you need an antidepressant. It means that you need a thoughtful evaluation that looks at your mental health, your sleep, your stress, your medical history, and your hormonal transition together and not separately.

Can we talk about rage?

Rage is probably the symptom women are most embarrassed to bring up. Maybe you have found yourself snapping at your partner over something small, feeling irritated by noises that never used to bother you and getting disproportionately angry over things that normally would have rolled right off your back. Commonly women then feel guilty afterward because that reaction did not feel like them.

I experienced it too. For me it was not constant anger, but was that the smallest things suddenly felt huge, and then I would judge myself for reacting that way. I was afraid to even name what I was experiencing as rage. It felt like too strong and dramatic of a word. I told myself it was just stress, just frustration, just a bad stretch. It took me a long time to connect it to what was happening hormonally.

Most women do the same thing. They minimize it, feel ashamed of it, or worry that something is seriously wrong with them. Very few are ever told that rage is a recognized and common symptom of perimenopause with a clear biological explanation. You are not alone in this. It is not a sign that something is fundamentally wrong with you as a person. It deserves the same clinical attention as any other symptom of this transition.

So if you've read this far and thought, “this sounds exactly like me,” you're not imagining it, and you're not broken. In part two, I'll walk through what actually helps: how I evaluate this in my own practice, where hormone therapy fits in, and the lifestyle pieces that make the biggest difference.