You have wondered, quietly, whether something is wrong. You have also wondered whether you are making too much of it.
The first thing I want to tell you is that what you are feeling has a name. The second thing I want to tell you is that the name is probably not the one you have been told to expect.
This post is for the woman who is not sure what is happening to her body, and who has not yet been given a word that fits. By the end of it, you will know what perimenopause is, why it might be starting earlier than you thought, what kind of symptoms it can bring, and what to do next.
Anna
Anna came to see me last year. She was forty-one. She sat down and apologised for taking up my time before I had asked her anything.
"I don't really know why I'm here," she said. "I just don't feel like myself. But I don't know if this is anything. Or if I am just getting older."
She had been tired for months. Her sleep was broken. Small things made her tearful or angry. Her periods had become unpredictable, sometimes heavier, sometimes lighter, sometimes skipping a month entirely. She had been doing more exercise and eating more carefully, and nothing had shifted.
She thought it was probably stress. Or maybe burnout. She had not connected any of it to her hormones, because in her head, hormone changes happened at fifty, not forty-one.
She is not the first woman to say this to me. She will not be the last.
What perimenopause actually is
Perimenopause is the transition before menopause. It is not menopause itself. It is the years leading up to it, when your hormones begin to change, but your periods have not yet stopped.
This is the part most women have not been told.
For decades, the conversation in this country has been about menopause defined as the point when your periods have stopped for twelve months in a row. That is one moment in time, usually around the age of fifty-one in the UK.
Perimenopause is everything that happens before that moment. And it can last four to ten years.
Here is what surprises most women: your oestrogen does not slowly decline in a tidy line during perimenopause. It goes up and down. It spikes and crashes. Some weeks you feel almost like yourself. Some weeks you do not. Progesterone, the other main hormone, also drops away unevenly.
This is why perimenopause can feel chaotic. Because biologically, it is.
And because oestrogen and progesterone have receptors all over your body and your brain, the symptoms do not stay in one system. They affect your sleep, mood, concentration, energy, temperature, skin, joints, sex drive, and periods. It is not one thing going wrong. There are many systems trying to adapt to shifting signals.
Am I too young for this?
This is the question I hear most often, and the one most women have been told the wrong answer to.
Perimenopause can begin in your late thirties or your early forties. The average age in the UK is around forty-five, but average means plenty of women start earlier and earlier does not mean something is wrong.
I have seen patients at thirty-eight with classic perimenopausal symptoms. I have seen patients at forty-one who had been told repeatedly that they were "too young for this," when in fact they were exactly the right age.
A few things can shift the timing. Family history matters when did your mother go through it? Smoking can bring it forward. Certain medical treatments and conditions can change the picture. But for most women, the timing simply reflects the natural variation in how our bodies move through this stage of life.
If you are in your late thirties or your forties and your body has started doing things it did not used to do, you are not too young for this conversation. You are exactly the right age to start having it.
Are my symptoms actually pointing at this?
Perimenopause does not look the same in every woman. There is no single picture. But there are categories of symptoms that come up again and again, and recognising them is the first step.
Sleep. Waking at three in the morning and not getting back. Sleep that feels light, broken, unrefreshing. Trouble falling asleep that you did not have before. Night sweats that wake you damp and cold an hour later.
Mood and mind. New anxiety that has no obvious cause. Tearfulness over small things. Anger that arrives fast and feels disproportionate. A flatness that you cannot quite shake. Brain fog. Forgetting words. Walking into rooms and not knowing why.
Cycle. Periods that change pattern: heavier, lighter, longer, shorter, closer together, further apart, skipping months and then returning. Premenstrual symptoms have become much worse than they used to be.
Body. Hot flushes and night sweats are the classic ones, but they are far from universal. Joint aches. Skin changes. Hair that thins or feels different. Vaginal dryness. Loss of libido. Headaches or migraines that have changed in pattern.
Energy. Tiredness that does not lift with sleep, food, or rest. The feeling that you are running at 60% of your usual capacity, with no clear reason.
You do not need all of these to be in perimenopause. You might have two or three that have become difficult. That is enough to take seriously.
If several of these are ringing true as you read them, perimenopause is a fair possibility. It is not the only possibility; some of these symptoms can be caused by other things, including thyroid problems, anaemia, or stress on its own, but it deserves to be on the list and properly considered.
What can I do about it?
If you suspect this might be you, here is what I would suggest.
Start by writing down what has changed and when. Not a perfect diary. Just notes. Which symptoms have become difficult? When they started. Whether they follow your cycle. This will help you and any doctor you see make sense of the picture.
Then book an appointment with your GP. If your surgery has a doctor with an interest in women's health or perimenopause, ask the receptionist whether you can see that GP specifically. A double appointment, if you can get one, is worth asking for. If not possible, be prepared to see the GP several times, as this is not an easy consultation for them either.
Be clear about the impact, not just the symptoms. "I am not sleeping, my mood is changing, my periods are different, and it is affecting my work and my family" lands differently than "I have been so tired lately"
If your bloods come back normal, do not assume that means nothing is happening. Perimenopause is a clinical diagnosis, made by listening to you and looking at your age and your symptoms and your cycle. It is not made by a blood test, and a normal result does not rule it out. I have written a separate post about exactly why that is, and what to do if you find yourself in that situation.
If you want to read the story of how I came to write this blog: including how I missed perimenopause in my own patients, and then in myself, that is what I was the non-believer covers. If you have been wondering why your symptoms come and go without a pattern, Why perimenopause symptoms feel so unpredictable is the post for that.
This blog exists because there is a gap between dismissive medicine and the noise of the internet, and women in their early forties are falling into it. The aim of every post here is to give you information that is clinically honest, plainly written, and useful to take with you the next time you sit down in front of a doctor.
You are not making too much fuss of this.
You are not too young for it.
And you are not on your own with it.
Patient details have been changed. The clinical pattern is real.