Women's health · 40s - 50s · Clinician-reviewed
It is not you. It is your oestrogen.
Perimenopause can start a decade before your last period, and it rarely announces itself with hot flushes. It arrives as brain fog, 3am waking, rage that frightens you, joints that ache, and a competence that seems to have quietly left the building. Every one of those is a hormonal symptom, and every one is treatable.
What women bring us at this stage.
- Brain fog and word-finding difficulty
- Broken sleep and night waking
- Mood, rage and anxiety
- HRT: whether, which, how much
- ADHD symptoms sharpening in your forties
- Weight, muscle and metabolic change
What we look at first.
Symptoms over bloods. In perimenopause, hormone levels swing week to week, so a normal blood test rules almost nothing out. A structured symptom picture is the diagnostic tool.
Then the decision that matters most: whether hormone therapy is right for you, which route and dose, and what to expect in the first three months.
The ADHD overlap.
Falling oestrogen removes a dopamine buffer that had been doing invisible work. Many women meet ADHD criteria for the first time in this decade, and many more find medication that worked for years suddenly does not. Treating one without the other rarely holds.
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Common questions.
Am I too young for perimenopause?
Perimenopause commonly begins in the early forties and can begin in the late thirties. Age alone does not rule it out, and being told you are too young is one of the most common reasons women lose years to it.
Do I need a blood test to start HRT?
Usually not. UK guidance supports diagnosing perimenopause on symptoms in women over 45, and hormone levels fluctuate too much to be reliable. Bloods are used to exclude other causes, such as thyroid or anaemia.
Worth reading
Why symptoms get louder in your forties.
What oestrogen replacement can and cannot do for focus.
What it is, and what actually clears it.
Three products worth the money, and the rest of the aisle explained.
What helps after your final period.