Something has shifted. You can feel it — even if you can't quite name it. Maybe it's the sleep. Waking at 3am with your mind racing and your heart pounding, then dragging yourself through the next day on empty. Maybe it's the weight that appeared around your middle without any change in how you eat. Or the anxiety that came out of nowhere. The brain fog. The hot flushes. The sense that your body is doing something you don't fully understand.
If you're a woman in your late 30s, 40s, or early 50s, perimenopause may well be at the root of it. And while most women have heard of menopause, perimenopause — the transitional phase that comes before it — is far less understood, far less talked about, and far more wide-ranging in its effects than many women expect.
This perimenopause symptoms checklist covers all 34 recognised symptoms, what's behind each one, and what to do if you recognise yourself here.
What is perimenopause — and when does it start?
Perimenopause is the phase of hormonal transition that leads up to menopause. Menopause itself is defined as the point when you have gone 12 consecutive months without a period — typically around age 51 in the UK. Perimenopause is everything that comes before it. And it can start much earlier than most women realise. While 47–48 is a common age to notice symptoms, perimenopause can begin in the late 30s for some women. It typically lasts between four and ten years.
During this time, the ovaries gradually produce less oestrogen and progesterone. Because oestrogen receptors exist throughout the entire body — in the brain, bones, heart, skin, gut, bladder, and more — falling oestrogen levels can affect almost every system you have. That's why the symptom list is so long, and why perimenopause can feel so all-encompassing.
The perimenopause symptoms checklist
The British Menopause Society recognises 34 symptoms of perimenopause and menopause. We've grouped them here to make them easier to understand.
Changes to your cycle:
- Irregular periods — closer together, further apart, heavier, or lighter
- Skipped periods
- Heavier or more painful periods than usual
- Spotting between periods
Hot flushes and temperature:
- Hot flushes — sudden waves of heat, often in the face, neck, and chest
- Night sweats — waking drenched in the night
- Feeling too hot or too cold at unpredictable times
Sleep:
- Difficulty falling asleep
- Waking in the night, often between 2–4am
- Unrefreshing sleep — waking still exhausted
- Vivid or disturbing dreams
Energy and fatigue:
- Persistent tiredness that rest doesn't fix
- Feeling “wired but tired” — exhausted but unable to switch off
- Low stamina — things that felt easy feel harder
Mood and mental health:
- Low mood or feelings of sadness without clear cause
- Anxiety or a sense of dread — new or worsening
- Irritability or a shorter fuse than usual
- Feeling tearful or emotionally fragile
- Loss of motivation or interest in things you usually enjoy
- Feeling unlike yourself
Brain and cognition:
- Brain fog — difficulty thinking clearly or finding words
- Memory lapses — forgetting names, words, where you put things
- Poor concentration — struggling to focus on tasks
- Mental fatigue
Body and weight:
- Weight gain, particularly around the abdomen
- Bloating
- Joint aches and pains — especially knees, hips, fingers
- Muscle weakness
- Changes in body shape even without dietary changes
Skin and hair:
- Dry or thinning skin
- Hair thinning or increased shedding
- Changes in body hair
- Adult acne or skin breakouts
Bladder and pelvic floor:
- Needing to urinate more frequently
- Leaking urine when coughing, sneezing, or exercising
- Urgency — a sudden strong urge to urinate
- Recurrent UTIs
Sexual health:
- Vaginal dryness or discomfort
- Reduced libido
- Discomfort during sex
Heart:
- Heart palpitations — a fluttering or racing sensation in your chest
Other:
- Headaches or migraines — new or worsening
- Tingling or crawling sensations in the skin
- Tinnitus (ringing in the ears)
- Changes in taste or a metallic taste in the mouth
- Increased sensitivity to sounds or light
The symptoms that most often get missed — or dismissed
Some of the most disruptive perimenopause symptoms are also the least well-known. These are the ones women are most often told are “just anxiety” or “just stress.”
Anxiety and heart palpitations are among the most common perimenopause symptoms — and among the most frightening, because they feel physical and urgent. Many women end up in A&E convinced something is wrong with their heart, only to be told everything is fine. Oestrogen has a calming effect on the nervous system; as it falls, anxiety can rise significantly.
Brain fog is one of the symptoms women find most distressing, particularly those in demanding jobs. The difficulty finding words, the patchy memory, the inability to concentrate — these are real, documented neurological effects of declining oestrogen. They are not a sign of early dementia, and they do improve.
Joint pain often surprises women who don't expect a connection between their hormones and their knees. Oestrogen has an anti-inflammatory effect on joints; without it, many women experience aching and stiffness that feels completely disconnected from their other symptoms.
Sleep disruption is frequently underestimated in its wider impact. Poor sleep over months or years contributes to weight gain, low mood, brain fog, reduced immunity, and anxiety — meaning that one symptom can be driving several others.
Could it be something else? The thyroid connection
If you've ticked many of the boxes on this checklist — particularly fatigue, weight gain, brain fog, and mood changes — it's worth knowing that these are also the primary symptoms of hypothyroidism (underactive thyroid). Thyroid conditions are significantly more common in women over 40, and the hormonal shifts of perimenopause can unmask thyroid problems that were previously manageable. Many women are navigating both at the same time, without realising it.
If you're speaking to your GP about perimenopause symptoms, ask for a thyroid blood test at the same appointment — ideally including TSH, Free T4, and thyroid antibodies. You can read more about the overlap in our article: Hypothyroidism vs Perimenopause Symptoms — How to Tell the Difference.
What to do with your checklist
Step 1 — Make a record. Go through the checklist and note which symptoms apply to you, when they started, and how they affect your daily life. Include your cycle pattern — how regular it is, whether it has changed recently.
Step 2 — Book an appointment. Take your notes to your GP. You can ask specifically about perimenopause — you don't have to wait for your doctor to raise it. Ask for a thyroid blood test at the same time.
Step 3 — Know your options. There is a wide range of support available, from lifestyle approaches to HRT (hormone replacement therapy) to targeted nutritional support. You don't have to manage symptoms alone, and you don't have to wait until they become unbearable.
Step 4 — Be patient with yourself. Perimenopause is a significant hormonal transition. It takes time to understand what's happening in your body, find what helps, and adjust. Many women find that once they understand what's going on, the symptoms feel more manageable — even before anything has changed medically.
When to seek further help
If any of the following apply, please speak to your GP promptly rather than waiting: bleeding between periods or after sex; periods that stop suddenly before age 40; heart palpitations that are frequent, severe, or accompanied by chest pain or breathlessness; symptoms of depression that are significantly affecting your daily life; or any symptom that concerns you — you know your body, and your concern is valid.
This article is for informational purposes only and does not constitute medical advice. Always consult a qualified healthcare professional for guidance on your personal health.
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