Why Hormones Make You More Emotionally Reactive
Unexpected crying, sometimes in response to an advertisement, a song, a kind word, or no discernible trigger at all, is a frequently reported and remarkably common experience during perimenopause. Women who describe themselves as emotionally steady for most of their adult lives often find themselves crying more easily, feeling overwhelmed by situations that would not previously have affected them, or cycling through emotional states with a speed and intensity that feels foreign and distressing.
This is not a psychological failing or an indicator of mental illness. It is a neurobiological consequence of the hormonal changes that characterise perimenopause, and it is directly traceable to estrogen’s role in brain function.
Estrogen has receptors distributed throughout many regions of the brain, including the amygdala (the emotional processing centre), the prefrontal cortex (responsible for emotional regulation and rational decision-making), and the hippocampus (involved in memory formation and contextualising emotional experiences). During the reproductive years, stable estrogen levels help maintain a baseline of emotional resilience by supporting the production and sensitivity of key neurotransmitters including serotonin, dopamine, and gamma-aminobutyric acid (GABA).
Serotonin, in particular, is intimately linked with mood stability. Estrogen increases the synthesis of serotonin, reduces its reuptake into nerve terminals, and enhances receptor sensitivity, effectively amplifying the calming, mood-stabilising signal. As estrogen fluctuates and begins to decline during perimenopause, serotonergic tone can become inconsistent. The result is a brain that is less reliably buffered against emotional stimuli.
The amygdala, which processes threat and emotional salience, becomes relatively more reactive when the moderating influence of estrogen-supported serotonin is reduced. The prefrontal cortex, which normally modulates and contextualises emotional responses, does so less efficiently when estrogen signalling is disrupted. The practical outcome is that stimuli that the brain once processed without significant emotional amplification are more likely to trigger a full-body response, including tears.
Why the Crying Can Feel So Bewildering
One of the most frequently described aspects of perimenopausal emotional changes is the sense of disconnection between the emotional intensity of a response and the apparent significance of the trigger. A woman may cry at a news segment, feel inexplicably moved by her child leaving a room, or find herself overwhelmed by frustration at a minor inconvenience in a way that feels disproportionate and alien.
This disproportionality is itself a hallmark of reduced emotional regulation capacity, the brain is experiencing the emotional signal more fully but has less top-down control to contextualise and modulate it before it reaches expression. This is distinct from clinical depression, in which the emotional content is more characteristically flat, hopeless, or persistently low rather than reactive and varied.
Progesterone decline also plays a role. Progesterone metabolises into a neurosteroid called allopregnanolone, which acts on GABA-A receptors in the brain to produce calming, anxiolytic effects. As progesterone becomes less predictable during perimenopause, GABA signalling can become less stable, leaving the nervous system more prone to emotional surges and rapid cycling.
Distinguishing Normal Emotional Reactivity from Depression
It is important to distinguish perimenopausal emotional lability from clinical depression, because both are more common during this transition and they require different management.
Emotional lability in perimenopause tends to involve reactive emotions, crying in response to something touching, irritability in response to stress, with periods of feeling more like yourself in between. There is often still an capacity for positive emotion; laughter, pleasure, and connection remain accessible even if mood is less stable overall.
Clinical depression, which is also approximately twice as common in women during the perimenopause transition compared to the general population, involves a more sustained low mood, loss of interest and pleasure, negative future thinking, and often a pervasive sense of worthlessness or hopelessness. If you are experiencing symptoms that fit this pattern, or if emotional changes are severely interfering with your daily function, work, or relationships, a conversation with a doctor or mental health professional is important.
What Can Help
Recognising that random crying and emotional reactivity during perimenopause are neurobiological rather than characterological is itself a significant source of relief for many women. Understanding why it is happening reduces shame and anxiety around the experience.
Practically, strategies that support emotional regulation include prioritising sleep (which directly restores prefrontal regulatory capacity), regular exercise particularly aerobic movement which boosts serotonin and BDNF, reducing alcohol which fragments sleep and worsens emotional lability, and nervous system regulation practices such as breathwork and mindfulness.
For women with significant emotional symptoms, HRT can substantially reduce emotional reactivity by restoring more consistent estrogen signalling to the brain’s mood systems. Working with a therapist, particularly one familiar with perimenopause, can also support the development of updated coping strategies for an altered neurological terrain.
This information is for educational purposes only and does not constitute medical advice. Always consult a qualified healthcare professional before making any changes to your health management.