Menopause: which signs are harmless and which need a doctor soon

Let's start with what weighs on your day without being dangerous. Hot flashes affect up to 80% of women during menopause ^[1]. That wave rising to your face, that 3am wake-up drenched in sweat, isn't in your head or a sign your body is failing. It's your internal thermostat thrown off by dropping estrogen. They can last longer than anyone warned you, a median of around 7 years ^[2].

Sleep and mood follow. Between 40% and 60% of perimenopausal women report disrupted nights ^[3], and the risk of anxious or depressive symptoms genuinely rises during the transition ^[4]. This isn't weakness of character: estrogen shapes serotonin, one of your feel-good messengers.

These symptoms share one thing: they're tied to hormonal swings, and they have solutions. Menopausal hormone therapy (MHT) relieves hot flashes and sleep problems ^[5]. Exercise and cognitive behavioural therapy also help, when MHT isn't an option ^[6]. "Harmless" describes the outlook, not your right to feel better: asking for relief is never overreacting.

Here's the reflex to unlearn: heavy fatigue isn't automatically hormonal. You can sleep, ease off, and still wake up drained, as if you're filling a leaking tank.

The number one suspect is low iron. In perimenopause, your periods often become heavier. These repeated losses slowly empty your iron stores, called ferritin ^[7]. Iron carries oxygen: when it runs low, you feel exhausted, you concentrate poorly, and you're quickly breathless ^[7]. Around one in four women who aren't yet menopausal are low on iron ^[8], especially those who bleed heavily ^[7]. The good news: it's fixable, with oral or intravenous iron, and the fatigue often improves within weeks ^[7].

Iron isn't the only culprit. A sluggish thyroid gives the same signals: exhaustion, feeling cold, brain fog. That's why guidelines advise checking the thyroid and anaemia when fatigue persists, before pinning everything on hormones ^[5]. In practice, you can ask for a simple panel: ferritin (your iron stores), TSH (your thyroid), and a full blood count (FBC). If you're told "it's your age" without a single test, you have every right to ask for it.

The fog in your head is real. You lose your words, you walk into a room without knowing why, you reread the same email three times. You're not imagining it.

Up to 60% of women report problems with concentration and memory during the transition ^[9]. You're part of a huge majority, not a worrying exception.

Estrogen supports the brain regions handling memory and concentration. When it drops and fluctuates, those systems have to adapt, and you feel foggy ^[6]. Picture a browser with too many tabs open: everything lags, but nothing is broken.

Here's the part that matters: this fog is almost always temporary. It mostly affects word memory and processing speed, and it isn't an early sign of Alzheimer's disease ^[9]. Once hormones settle after menopause, the brain reorganises and the fog clears ^[6][10]. You can help it: sleep better, move regularly, and correct any iron or thyroid deficiency, which make it worse. See your doctor if the fog clearly worsens over months or worries those around you.

Now the short list. Not to scare you, but so you know exactly when to pick up the phone.

• Bleeding after menopause. Once you've gone twelve months with no periods, your womb should not bleed again. If blood returns, even a few drops, get it checked quickly ^[1]. In about 9 cases out of 10 it's benign ^[11], but nearly 9% of these bleeds reveal endometrial cancer ^[12], which is highly treatable when caught early. An ultrasound (a scan using sound waves) and sometimes a biopsy (a small tissue sample) settle it ^[11].
• Chest pain. After menopause, you lose estrogen's protection on your arteries, and cardiovascular risk rises ^[13]. Cardiovascular disease is the leading cause of death in women ^[14]. Intense or lasting chest pain: call emergency services straight away.
• Unexplained weight loss. Losing weight without trying isn't an expected menopause symptom ^[5][15]. Talk to your doctor.
• A breast lump or change. Any new lump, any change in shape or skin, deserves a prompt check ^[15].

These four don't go in the "it's my age" box. For everything else, staying alert is enough.