How to Tell When Hormones Are (and Aren’t) the Cause of Your Symptoms
Fatigue, anxiety, brain fog, sleep problems, and cycle changes in midlife explained
Is Perimenopause Causing Your Symptoms?
If you’re in your late 30s or your 40s and noticing changes like poor sleep, anxiety, brain fog, heavier or irregular periods, or low energy, it’s natural to wonder “is this perimenopause or is something else going on?”
Perimenopause can cause significant physical and emotional symptoms, but not every midlife symptom is hormonal. Assuming any health change in this age range is secondary to the midlife hormonal shift can actually delay proper assessment and diagnosis, as well as effective treatment.
Common Perimenopause Symptoms
Perimenopause is the transition leading up to menopause and often begins many years before periods stop completely (which is called menopause). This makes perimenopause harder to diagnose. Symptoms are often driven by hormonal fluctuations more like a rollercoaster, not a steady decline.
Common perimenopause symptoms include:
Irregular or heavier menstrual cycles
Sleep disruption or insomnia (hello 3am wake-ups!)
Hot flashes or night sweats
Anxiety, irritability, rage, or low mood
Brain fog and reduced concentration
Fatigue
Migraines or headaches
Changes in body composition
Conditions That Can Mimic Perimenopause
Many other conditions cause symptoms similar to perimenopause. These must be ruled out before attributing symptoms to perimenopause alone.
Iron Deficiency
Iron deficiency (even without anemia) can cause: fatigue, hair thinning or shedding, shortness of breath, anxiety or low mood
Heavier periods during perimenopause increase risk.
Thyroid Disorders
Thyroid dysfunction can cause: fatigue, weight changes, anxiety or depression, hair thinning, temperature dysregulation (cold or heat intolerance), sleep problems
Thyroid issues are common in midlife and are not caused by perimenopause, but symptoms often overlap.
Sleep Disorders
While sleep can be impacted by hormones, not all sleep issues are hormonal. Other contributors may include: sleep apnea (OSA), restless leg syndrome (RLS), chronic stress and nervous system dysregulation
Poor sleep worsens fatigue, mood, cognition, and metabolic health.
Mental Health Changes
Low mood and anxiety symptoms may first occur or increase during perimenopause and may require additional mental health assessment and support.
Is Hormone Testing Useful in Perimenopause?
Hormone testing is usually not required in perimenopause because levels fluctuate day-to-day throughout the menstrual cycle, and absolute hormone levels don’t often correlate well with symptom occurrence or severity; it’s more about the changes in hormone levels than the actual hormone levels themselves. That said, blood work is often very helpful in ruling out other contributors and should be pursued. Blood tests often include:
Nutrients: iron, vitamin B12, vitamin D
Thyroid markers
Blood sugar and metabolic markers
Any other tests indicated by your specific symptoms and your personal or family health history.
The goal is to avoid missing other treatable causes of symptoms.
A Better Question to Ask
Instead of asking “Is this perimenopause?”, a more useful question is: “What factors are contributing to my symptoms? And what can be treated?”
Many patients feel significantly better with a comprehensive, individualized approach that may include:
Hormonal support (eg. menopausal hormone therapy) when appropriate
Nutrient repletion
Sleep optimization
Stress and mental health support
Evidence-based lifestyle strategies including regular exercise
When to Seek Professional Support
Consider individualized care if symptoms are:
Persistent or worsening
Affecting daily function or quality of life
Not improving with basic lifestyle changes
You don’t have to grit your teeth and keep managing while you wait until your periods stop. You deserve care that looks beyond age or assumptions and focuses on root causes and evidence-based solutions.
Key Takeaway
Perimenopause is real. And so are your symptoms.
But they’re also treatable, especially when care is thoughtful, comprehensive, evidence-based, and individualized.