Perimenopause Mood Swings: Why They Happen and How to Manage Them

What do perimenopause mood swings feel like?

Women describe them in strikingly similar ways:

• Snapping over something small, then being shocked by your own reaction
• Crying without a clear reason
• Anxiety or dread that appears out of nowhere, sometimes with a racing heart
• Feeling flat, numb or "not like myself"
• Premenstrual symptoms that are suddenly much stronger, or that last longer
• Feeling fine for days, then hitting a wall of irritability or sadness

What sets these apart from ordinary stress is how unpredictable and out of proportion they can feel. Many women first notice them in their early-to-mid 40s, often before hot flashes start and while periods are still fairly regular. For the full range of changes in this phase, see our guide to perimenopause symptoms.

Why does perimenopause cause mood swings?

Hormones that swing, not just fall

In perimenopause, estradiol doesn't drift down smoothly. It can surge higher than it did in your 30s in one cycle and drop sharply in the next. Estrogen influences serotonin, dopamine and other brain chemical systems that regulate mood, so these swings can affect how you feel from week to week. Research suggests that the variability of hormones, rather than any single level, is linked to depressed mood: in the Penn Ovarian Aging Study, changes in estradiol and other reproductive hormones were associated with depressed mood in women with no prior history of depression (Freeman et al., 2006).

Progesterone usually falls earlier, as ovulation becomes less regular. Some of its by-products act on the brain's calming GABA system, and researchers are still working out how much its decline contributes to anxiety and sleep problems.

Sleep loss

Sleep problems rise across the transition (Kravitz et al., 2008). Night sweats, early waking and anxiety feed each other, and even a few short nights lower your tolerance for stress the next day. The Sleep Foundation describes how hormone changes and hot flashes disrupt sleep during this stage.

Hot flashes

Women with more hot flashes tend to report more mood symptoms. In the Harvard Study of Moods and Cycles, the risk of new depression in perimenopause was somewhat greater in women who had hot flashes (Cohen et al., 2006).

Midlife load

Perimenopause often coincides with caring for children and aging parents, career pressure, relationship changes and health worries. None of that causes perimenopause, but it piles onto a brain already dealing with hormonal turbulence. Our article on stress and hormones explains how the two interact.

Is it mood swings or depression?

This matters, because depression needs its own treatment. Perimenopause is a window of real vulnerability. Women without a prior history of depression were about twice as likely to develop significant depressive symptoms after entering perimenopause (Cohen et al., 2006), and in SWAN, women were two to four times more likely to have a major depressive episode during perimenopause or early postmenopause than before it (Bromberger et al., 2011). A past history of depression is the strongest predictor (Maki et al., 2018).

By the numbers

Depression risk in perimenopause

~2×likelier significant depressive symptoms after entering perimenopause, with no prior depressionSource: Cohen 2006

2–4×likelier major depressive episode in perimenopause or early postmenopauseSource: Bromberger 2011

Other conditions can mimic perimenopausal mood changes, so a good evaluation may include checking for thyroid problems, anemia, sleep apnea, and alcohol or medication effects. Severe mood symptoms that reliably start in the week or two before your period and lift once it begins may be premenstrual dysphoric disorder (PMDD), which can intensify in perimenopause.

How to manage perimenopause mood swings

Start with sleep

• Keep a consistent wake time, even after a bad night.
• Keep the bedroom cool and use breathable bedding if you have night sweats.
• Cut back on alcohol, which fragments sleep and can worsen mood the next day.
• Limit caffeine after midday.
• If insomnia lasts more than a few weeks, ask about cognitive behavioral therapy for insomnia (CBT-I).

Move most days

Regular aerobic activity, such as brisk walking, has well-established benefits for mood and stress, and strength training adds protection for muscle and bone. Exercise has not been shown to reduce hot flashes, but it is one of the most reliable ways to support mood and sleep.

Build in small, real breaks

Mindfulness, breathing exercises, time outdoors and protected time with people who make you feel better all help regulate stress. Naming what is happening ("this is a hormone-driven wave, and it will pass") can take some of the sting out of a bad moment.

Track your patterns

Note your mood, sleep, hot flashes and cycle days for two or three months. Patterns help you anticipate hard days and give a clinician much better information.

Talk therapy

Cognitive behavioral therapy and other psychotherapies are proven treatments for depression and anxiety and are recommended as first-line options for depression in perimenopause (Maki et al., 2018). CBT designed for menopause also helps with hot flashes and sleep.

A word on supplements

Magnesium, vitamin D and omega-3s are often recommended for mood, but evidence that they help perimenopausal mood swings is limited, and vitamin D helps mainly if you are deficient. St. John's wort interacts with many medicines, including antidepressants, blood thinners and hormonal birth control. Check with a clinician before starting any supplement.

Medical treatments that can help

Antidepressants

For depression or anxiety disorders in perimenopause, antidepressants such as SSRIs and SNRIs are first-line treatments. Some also reduce hot flashes, which makes them a useful option for women with both.

Hormone therapy

Estrogen is not FDA-approved to treat depression, but expert guidelines note evidence that it has antidepressant effects in perimenopausal women, particularly those who also have hot flashes (Maki et al., 2018). In a randomized trial, perimenopausal and early postmenopausal women given transdermal estradiol with intermittent micronized progesterone were less likely to develop clinically significant depressive symptoms over a year than those given placebo, with the benefit seen mainly in the early transition (Gordon et al., 2018).

Hormone therapy should not replace mental-health care for depression or anxiety, and it is not right for everyone; a history of breast cancer, blood clots, stroke or heart disease may rule it out. For women whose mood swings come with hot flashes, night sweats and poor sleep, it may be worth discussing. FDA-approved options include estradiol patches, gels and pills used with progesterone. Amie offers Amie HRT+, a compounded cream with estradiol and progesterone in a strength chosen by a licensed clinician; it is not FDA-approved, and a clinician decides whether it is appropriate for you.

When to talk to a clinician

• Your mood is affecting work, parenting or relationships
• Low mood or anxiety has lasted more than two weeks
• You are sleeping only a few hours most nights
• You are relying on alcohol or other substances to cope
• You have any thoughts of self-harm (call or text 988 now)