Most women expect perimenopause to announce itself with hot flushes and missed periods. So when the anxiety arrives out of nowhere, or the brain fog descends, or the sleep disappears — they look everywhere else for answers.
The truth is, perimenopause can begin as early as your mid-30s, and the symptoms are so varied that millions of women spend years not knowing what’s happening to them.
This is the list nobody gave you.
What is perimenopause, exactly?
Perimenopause is the transition phase before menopause — the time when your hormones begin to shift and your periods become irregular. It can last anywhere from 2 to 14 years, and it ends when you’ve gone 12 consecutive months without a period (that’s menopause).
During perimenopause, oestrogen and progesterone levels fluctuate unpredictably. This hormonal chaos affects almost every system in your body — which is why the symptoms are so wide-ranging.
The 22 symptoms of perimenopause
1. Anxiety that came from nowhere One of the most common and least discussed symptoms. Many women describe a persistent low-level dread or sudden panic attacks with no obvious cause. This is directly linked to fluctuating oestrogen, which affects serotonin and GABA — your brain’s calming chemicals.
2. Sleep problems Difficulty falling asleep, waking at 3am, or sleeping but never feeling rested. Often caused by falling progesterone levels, which normally have a sedative effect.
3. Brain fog Forgetting words mid-sentence. Walking into rooms and forgetting why. Struggling to concentrate. Oestrogen plays a key role in cognitive function, so when it fluctuates, so does your mental clarity.
4. Mood swings Feeling fine one moment and tearful or irritable the next. Often mistaken for depression or PMS.
5. Irregular periods Cycles that become shorter, longer, heavier, lighter, or simply unpredictable. This is one of the earliest and most reliable signs of perimenopause.
6. Heavy periods Flooding, passing clots, or periods that last much longer than usual. Caused by hormonal imbalance affecting the uterine lining.
7. Heart palpitations A racing, fluttering, or pounding heart — often at night. Oestrogen helps regulate the cardiovascular system, so as it fluctuates, so can your heart rhythm.
8. Hot flushes The classic symptom. A sudden wave of heat, often accompanied by sweating and a red face. Not everyone gets them, and they don’t always come first.
9. Night sweats Waking drenched in sweat. Often worse than hot flushes during the day and extremely disruptive to sleep.
10. Joint pain Aching knees, hips, wrists, or fingers — often with no obvious cause. Oestrogen has an anti-inflammatory effect, so as it declines, joints can become more painful.
11. Headaches and migraines Particularly around your period, or more frequent than before. Linked to oestrogen fluctuations.
12. Low libido Reduced interest in sex, often combined with vaginal dryness. Both are very common and very treatable — but rarely discussed.
13. Vaginal dryness Discomfort, itching, or pain during sex. Caused by falling oestrogen affecting the vaginal tissue. This symptom tends to worsen over time without treatment.
14. Urinary changes Needing to wee more frequently, urgency, or recurrent UTIs. The urinary tract is also affected by falling oestrogen levels.
15. Weight gain — especially around the middle Changes in fat distribution, particularly around the abdomen, are extremely common even without changes in diet or exercise.
16. Fatigue Bone-deep tiredness that sleep doesn’t fix. Often linked to poor sleep, hormonal changes, and the physical toll of managing so many symptoms at once.
17. Dry skin, hair, and nails Oestrogen supports collagen production, so as levels fall, skin can become drier and thinner, hair can thin or shed more, and nails can become more brittle.
18. Tingling or itching skin Known as formication — a crawling or tingling sensation on the skin with no rash. Caused by oestrogen’s effect on the nervous system.
19. Digestive changes Bloating, nausea, or changes in bowel habits. Oestrogen receptors are found throughout the gut.
20. Memory problems Difficulty retaining new information or retrieving memories. Distinct from brain fog — this is more about memory specifically.
21. Loss of confidence A subtler symptom, but one many women describe: a sudden loss of self-assurance, social withdrawal, or feeling unlike themselves.
22. Depression Persistent low mood, loss of interest in things you used to enjoy. While not caused by perimenopause alone, hormonal changes can significantly worsen or trigger depressive episodes.
What should you do if you recognise these symptoms?
Step 1: Download the Still Her Symptom Checklist Print it out and tick everything that applies to you. Having a clear record of your symptoms is the single most useful thing you can bring to a GP appointment.
Step 2: Track your symptoms Note when symptoms occur in relation to your cycle. This pattern can help a doctor or specialist understand what’s happening hormonally.
Step 3: See your GP Ask specifically about perimenopause. If you feel dismissed, ask for a referral to a menopause specialist. You are entitled to one.
Step 4: Consider getting a hormone test A blood test can check your FSH (follicle-stimulating hormone) levels, though it’s not always conclusive in perimenopause. Private hormone testing kits can also be done at home.
A note on diagnosis
There is no single definitive test for perimenopause. Diagnosis is based on symptoms, age, and menstrual history. If you are in your late 30s or 40s and recognising yourself in this list, perimenopause is a very real possibility — even if your blood tests come back “normal.”
You are not imagining it. And you deserve answers.
This article is for informational purposes only and does not constitute medical advice. Please speak to your GP or a qualified healthcare professional about your symptoms.
