- Perimenopause
Anxiety can increase during perimenopause because estrogen and progesterone, hormones that directly regulate your brain’s calming and stress-response systems, stop behaving predictably. It is not a coincidence, a character shift, or a purely psychological event. It is a measurable neurochemical consequence of hormonal withdrawal, and it has a specific, traceable mechanism.
Here is what’s actually happening.
Estrogen does much more than regulate reproduction. Estrogen receptors are found throughout the brain, including regions involved in mood, memory, attention, and the stress response, such as the hippocampus, prefrontal cortex, and amygdala.
Estrogen also interacts with several of the brain’s major signaling systems. It influences serotonin, which plays an important role in mood and emotional regulation, and dopamine, which is involved in motivation, attention, and reward. It also interacts with the systems that regulate the body’s response to stress.
For much of the reproductive years, the brain is accustomed to hormonal changes that follow a relatively predictable rhythm. Perimenopause changes that rhythm.
Estrogen does not simply decline in a smooth, steady line. Levels can rise and fall considerably, sometimes over relatively short periods of time and differently from one cycle to the next.
The brain must continually respond to that changing hormonal environment. It is this variability, not simply “low estrogen,” that may help explain why mood, sleep, cognition, and stress sensitivity can feel different during the perimenopausal transition.
Progesterone is often left out of conversations about perimenopause and anxiety, but its effects extend well beyond reproduction.
In the brain, progesterone can be converted into allopregnanolone, a neurosteroid that interacts with GABA-A receptors. GABA is one of the brain’s primary inhibitory signaling systems. Think of it as part of the circuitry that helps quiet neuronal activity and regulate the response to stress.
During perimenopause, ovulation can become less predictable. Because progesterone rises primarily after ovulation, changing ovulatory patterns can also mean more variable progesterone and allopregnanolone exposure.
That changing hormonal environment matters because the brain must continually adapt not only to fluctuations in estrogen, but also to changes in neurosteroids that influence GABA signaling. For some women, this may contribute to feeling more anxious, reactive, or less able to settle after stress.
This may help explain why anxiety can emerge during perimenopause, sometimes before a woman recognizes other changes as part of the menopausal transition.
Estrogen also interacts with the hypothalamic-pituitary-adrenal (HPA) axis, one of the body’s major stress-response systems. When you encounter a stressor, this system helps coordinate the release of cortisol and other signals that prepare the body to respond. Once the stressor passes, feedback mechanisms help bring that response back toward baseline.
During perimenopause, changing ovarian hormone patterns can influence how this stress-response system functions. At the same time, sleep disruption, hot flashes, changing mood, and the cumulative demands of midlife can all affect how the nervous system responds to stress.
For some women, the result can feel strikingly unfamiliar. A situation that once felt manageable may suddenly provoke a much stronger physical or emotional response. It may also feel harder to settle afterward.
This is one reason women sometimes describe perimenopausal anxiety as out of proportion to the trigger. The experience is real, but it is unlikely to come from a single hormone or pathway. Rather, it reflects the interaction between changing hormones, the brain, the stress-response system, sleep, and the circumstances of everyday life.
Estrogen and progesterone both interact with systems involved in sleep, and sleep disruption is common during perimenopause. Hot flashes and night sweats may interrupt sleep, but some women also experience difficulty falling asleep, frequent waking, or sleep that simply feels less restorative.
Poor sleep has effects of its own. It can alter stress-hormone signaling and make the brain more emotionally reactive, leaving you with less reserve for managing stress the following day.
This can create a difficult feedback loop. Changing hormones may contribute to disrupted sleep. Poor sleep can heighten anxiety and emotional reactivity. Anxiety, in turn, can make it harder to fall asleep or stay asleep.
That is part of why perimenopausal anxiety can feel so layered. It is rarely the result of one hormone or one pathway acting alone. Hormonal changes, sleep, stress-response systems, and emotional regulation can influence one another, sometimes making it difficult to tell where one ends and another begins.
Perimenopausal anxiety can sometimes appear without an obvious trigger, including in women who have never experienced significant anxiety before. When that happens, the symptom may be evaluated primarily through a mental health lens without considering whether the menopausal transition could also be contributing.
That distinction matters. Recognizing a possible hormonal contribution does not make the anxiety less real, nor does it mean mental health treatment is inappropriate when it is needed. It simply means that changing ovarian hormones are one part of the broader biological and clinical context worth considering.
Anxiety during perimenopause can have many contributors, and more than one may be present at the same time. The goal is not to label anxiety as “hormonal,” but to make sure the hormonal transition is not left out of the conversation.
Bringing specifics to a clinical appointment changes the quality of that conversation. Worth noting over a few cycles:
This article answers one question. Your health story is usually more connected than a single symptom. The MyClarity Learning Paths are designed to help you understand the larger physiology, notice patterns across symptoms and life stages, and turn that understanding into practical preparation for your care.
Understanding the physiology is often the first real relief many women experience. It can reframe the experience from “something is wrong with me” to “there may be a reason for what I am experiencing.” MyClarity’s Perimenopause Learning Path goes further into this and the full range of neurological and emotional shifts of the transition. The free MyCare Conversation Guide helps you track patterns like these, so you walk into your next appointment with real data instead of a vague sense that something’s off.
April Lind, MD is a physician and the founder of MyClarity, a physician-founded women’s health education platform. This article is for educational purposes only and does not constitute medical advice. Please consult a qualified clinician about your specific symptoms and health history.
Fidecicchi T, Giannini A, Chedraui P, et al. Neuroendocrine mechanisms of mood disorders during menopause transition: a narrative review and future perspectives. Maturitas. 2024;188:108087. Read the review
Brinton RD, Yao J, Yin F, Mack WJ, Cadenas E. Perimenopause as a neurological transition state. Nature Reviews Endocrinology. 2015;11(7):393–405. Read the review
Weber MT, Maki PM, McDermott MP. Cognition and mood in perimenopause: a systematic review and meta-analysis. Journal of Steroid Biochemistry and Molecular Biology. 2014;142:90–98. Read the article
From physiology to psychology: an integrative review of menopausal syndrome. 2025. Read the review
Medically reviewed by April Lind, MD · Last reviewed [August 2026]
Dr. April Lind, Founder of MyClarity
As a physician in women’s health, I have spent years caring for women across life stages – adolescence, pregnancy, postpartum, infertility and into midlife. I created MyClarity because women deserve to understand what is happening in their bodies before they are told what to do about it.
Join my mailing list and receive new posts directly to your inbox.
