I used to dismiss my sudden highs as “just stress,” my darkest nights as “just a bad week.” I thought everyone had mood swings, until one day, I realized mine didn’t belong in that normal spectrum. If you’re reading this, maybe you’re sensing something similar. You’re not alone. Here are three essential truths every woman should know about bipolar disorder, because knowing can be the start of healing.

1. Hormonal Changes Can Unmask Bipolar for the First Time

It stunned me to learn that the years around menopause, a time I assumed would simply dull my emotions, are exactly when bipolar disorder may first show up in women. According to a landmark study led by Cardiff University, women in perimenopause (the years before their final period) are over twice as likely to experience a first-onset manic episode (a hallmark of bipolar) compared to pre-menopause years.

This doesn’t mean menopause causes bipolar, but the hormonal shifts, especially declining estrogen, may reduce the brain’s usual protections. Disrupted sleep from hot flashes compounds that vulnerability, and emerging research adds another layer to the story. According to a systematic review titled “Understanding the Impact of Gut Microbiome on Mental Health” by Chintalapudi and colleagues, people with bipolar disorder often show disrupted gut microbiota patterns linked to immune and inflammatory changes. These shifts can influence mood stability and emotional regulation, adding another layer to how the body’s internal systems interact with the brain. For many women, mood instability that had once seemed mild suddenly escalates during this “in-between” season.

What this means: If mood shifts or unusual emotional swings begin in your late 40s or early 50s, don’t dismiss them. Ask your clinician about screening for bipolar disorder, especially if there’s no prior mental health history.

2. The Symptoms in Women Often Get Written Off

I’ve heard stories of women being told to “grow up,” “just snap out of it,” or “you’re just hormonal.” That’s dangerous. Many women with bipolar disorder endure years of misdiagnoses or no diagnosis at all, because their moods are mistaken for depression, stress, or PMS.

One woman described living in “summer” and “winter” periods: in summer, she felt radiant, full of confidence; in winter, the world dimmed, tears were always near, and suicidal thoughts hovered. She assumed it was just “her cycle.” Another was in her 30s and was frequently told she was overreacting until a therapist diagnosed her with bipolar.

This pattern isn’t random. Women are more likely to have depressive or mixed episodes, which can hide manic or hypomanic signs. Because the depressive side dominates, clinicians may treat depression without noticing the bipolar undercurrent.

What this means: If depression treatments haven’t helped, or if you’ve ever had brief periods of high energy, confidence, less need for sleep, or impulsivity, mention these to your provider. Bipolar is a possibility, not a character flaw.

3. Mania/Hypomania Has a Medical Definition, It’s Not Just “Feeling Good”

One of the biggest illusions around bipolar is that “mania” means hyper-productivity or confidence. In truth, mania and hypomania have specific clinical definitions, and they often carry serious consequences.

The DSM-5-TR (the psychiatric handbook clinicians use) requires that for a diagnosis of bipolar I, you must have had at least one manic episode: an intense, elevated mood for at least one week (or requiring hospitalization), coupled with increased activity, grandiosity, reduced need for sleep, racing thoughts, distractibility, or risky behavior. Bipolar II requires hypomania (a milder form, lasting 4+ days) plus one major depressive episode.

Medical sources confirm: these mood changes are more than “ups and downs.” They disrupt functioning, decision-making, relationships, and sometimes lead to hospitalization.

These biological dimensions are also gaining attention. In a recent study titled “Gut Microbiota Links to Cognitive Impairment in Bipolar Disorder via Modulating Synaptic Plasticity” published in BMC Medicine, researchers found that gut bacteria imbalances may also affect memory and concentration in bipolar patients. Restoring healthy microbiota improved both cognition and emotional balance in animal models, suggesting that mental health treatment might one day include supporting gut health.

More: https://peonymagazine.com/wellness/bipolar-disorder-in-women/