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Guide

Perimenopause

You are in your forties. You are waking at three in the morning for no reason. Your periods have gone strange. You are snapping at people you love. The weight has moved and nothing you used to do touches it. And when you finally mentioned it, someone told you your labs were normal.

This is the page I wish every woman had found two years earlier.

What perimenopause actually is

Perimenopause is the stretch of time before your periods stop for good. Not the event itself, the years leading up to it.

During those years your hormones do not decline in a neat, gradual line. They fluctuate, sometimes dramatically, and often unpredictably from one cycle to the next. Estrogen can swing higher than it ever did in your thirties, then drop sharply. Progesterone tends to fall away earlier and more steadily.

That instability is the reason this feels so disorienting. You are not dealing with a steady new normal. You are dealing with a moving target, which is also why some weeks feel fine and others do not.

For most women it begins somewhere in the forties, though it can start in the late thirties. It commonly lasts somewhere between four and ten years.

Why your labs often look normal

This is the part that causes the most frustration, and it is worth understanding properly.

A hormone blood test gives you one reading, on one day, of something that is fluctuating week to week. Draw it on a high day and everything looks fine. Draw it on another day and it might not. A single normal result does not rule out perimenopause, and no blood test diagnoses it on its own.

Perimenopause is usually identified from your age, your cycle pattern and your symptoms, not from a number on a page. So when you are told your labs are normal, that can be perfectly true and completely unhelpful at the same time.

That does not mean testing is pointless. It means testing answers a different question: what else might be going on alongside this.

What it actually feels like

Most women do not arrive saying they think they are in perimenopause. They arrive with one symptom that has become hard to ignore, and only later find out the rest were connected.

Waking at 3am, every nightFalling asleep fine, then wide awake in the small hours Rage and irritability that is not like youA fuse much shorter than it used to be Your periods are changingCloser together, heavier, or skipping altogether Brain fog and losing your wordsRereading the same paragraph, forgetting why you came in Exhausted but wiredToo tired to function, too wired to switch off Everything achesMorning stiffness, sore joints, and being told it is just age The symptoms nobody connectsPalpitations, dry eyes, itchy skin, tinnitus, burning mouth Weight that moved to your middleAnd does not respond to what used to work Anxiety that came from nowhereIn a woman who was never an anxious person Told it is just your ageStiffness, inflammation, and being told it is just age

Night sweats, hot flashes, hair thinning, dry skin, lower libido and a frozen shoulder that arrived out of nowhere all belong on this list too.

What else it could be

This matters, and plenty of perimenopause content skips it.

Several other conditions produce almost exactly these symptoms, and some of them are straightforward to identify and treat. Thyroid disease. Iron deficiency, particularly if your periods have become heavy. Sleep apnea, which is underdiagnosed in women and often presents as fatigue and brain fog rather than snoring. Depression and anxiety in their own right. Vitamin D and B12 deficiency.

Assuming everything is hormones in your forties is just as unhelpful as assuming nothing is. Both answers skip the work.

When to see a doctor sooner rather than later

Some bleeding changes need checking promptly, not monitoring. Please arrange an appointment if you have:

  • Very heavy bleeding, soaking through protection hourly, or passing large clots
  • Bleeding between periods, or after sex
  • Periods arriving closer than three weeks apart, consistently
  • Any bleeding at all after twelve months without a period

These are not usually serious, but they do need ruling out properly rather than being put down to perimenopause.

How I approach it

I am a board-certified physician who spent more than two decades in conventional medicine before moving into functional medicine. I did not leave because I stopped believing in it. I left because a particular group of patients was not being served well, and most of them were women in exactly this stage of life.

Hormones are real and they matter. But hormones are not the only thing changing in your forties, and treating them in isolation is why so many women feel only partly better.

How you sleep, what your gut is doing, how much muscle you are carrying, how your blood sugar behaves, what your stress load looks like and what nutrients you are running low on all shape how this transition feels. Those things are not alternatives to hormone care. They are the ground it stands on.

Some women need hormone therapy and do very well on it. Some do not want it. Some cannot have it. All of them still have a foundation worth building, and that is the work I do.

Where to start

If you are trying to work out what is happening, start with the symptom that is bothering you most and read that page. Each one explains what is going on underneath and what actually tends to help.

If you want to go further than reading, there are two ways to work with me, and the right one depends mostly on whether you want individual medical care or structured guidance.

Understanding it

Doing something about it