Health & Wellness
Is This Perimenopause? 12 Signs to Notice in Your 40s
Periods, sleep, temperature, mood and concentration can shift in different ways. Here are 12 changes worth noticing, what else to consider, and a calm next step if you want to talk them through.
The short answer
What are the early signs of perimenopause?
A changing menstrual pattern is often one of the first signs. Hot flushes, night sweats, disrupted sleep, mood changes and brain fog may also appear. You might notice just one change or several; no checklist can tell you whether you are perimenopausal.
If a new symptom is worrying you or affecting daily life, speak to your GP; you do not have to wait for several signs.
Perimenopause Clarity Plan
A clearer way to notice your pattern
If you want somewhere to begin, The Perimenopause Clarity Plan has a 30-day tracker, weekly reflections and appointment prompts. It helps you organise what you notice; it cannot diagnose the cause.
Explore The Clarity Plan →EverGuide Studio
Perimenopause Clarity Plan
notice.
understand.
feel more prepared. ♡
Perimenopause
The transition before menopause
Perimenopause is the time leading up to menopause, when hormone levels and menstrual patterns begin to change. Symptoms and timing vary from person to person.
Menopause
A specific point in time
Menopause is reached when you have not had a period for 12 months. Hormonal contraception can affect bleeding patterns and make this harder to judge.
There is no single experience that proves you are in perimenopause. Some people first notice changes to their periods. Others become aware of disrupted sleep, hot flushes or a shift in how they feel day to day.
What can be useful is noticing whether several changes have begun to appear together, and whether they feel different from what is normal for you.
You do not need to collect every possible symptom before speaking to someone. One change that is affecting your quality of life is enough to start a conversation with your GP.
notice the pattern, not the panic. ♡
12 signs of perimenopause to notice
what feels different for you?
Your periods change
They may arrive sooner, later or less predictably. Your usual flow can become lighter or heavier. A marked increase in bleeding deserves a GP conversation.
Hot flushes appear
A sudden feeling of heat, often in the face, neck or chest, can come and go during the day. Some people feel a chill instead.
Night sweats interrupt sleep
You might wake hot or sweaty, sometimes with a racing heart. Notice whether this is new for you and how often it happens.
Sleep becomes less settled
Falling asleep or staying asleep may become harder, even on nights without a sweat. The effect on the next day matters too.
Your mood feels less familiar
Mood swings, anxiety or low mood may become more noticeable. You deserve support for the impact, whatever its cause.
Focus and memory feel different
Brain fog can show up as losing your train of thought, forgetting familiar things or finding it harder to concentrate.
Headaches or migraines change
Headaches may become more frequent or migraines more troublesome than usual. Discuss any new, severe or unusual headache with a clinician.
Muscles or joints ache
Stiffness or aches can become more noticeable. Their timing and effect on movement are useful to record.
Skin or hair changes
Dry or itchy skin and hair thinning can occur during this transition, though they can have other explanations too.
Vaginal comfort changes
Dryness, irritation or discomfort during sex are reasons to seek help. You can bring them up even if your periods have not changed.
Bladder symptoms appear
You might need to urinate more often or have symptoms that feel like a UTI. Pain or burning when you pee should be assessed rather than assumed to be hormonal.
Sex drive feels different
A change in libido may happen alongside shifts in sleep, mood or vaginal comfort. It is worth discussing if it matters to you.
Want the bigger picture first? Read Is It Perimenopause? Common Changes to Notice in Your 40s.
Notice the pattern
Track what changed, not just how many symptoms you have
A short record can make it easier to explain what has been happening and how it affects you. Start with the areas that feel most different from your usual baseline. For a gentle way to start, read How to Track Perimenopause Symptoms Without Feeling Overwhelmed.
Cycle
Timing, flow or a noticeable change from your normal pattern.
Sleep
Waking, night sweats and how rested you feel the following day.
Heat & body
Flushes, headaches, aches or other physical changes.
Mood & focus
Low mood, anxiety, memory or concentration changes.
Your age can change how perimenopause is assessed
Symptoms matter at every age, but clinical guidance takes age into account when deciding whether tests are useful.
Ages 40–45
It is worth starting the conversation
Menopause before 45 is considered early menopause. If you are between 40 and 45 and have menopause-associated symptoms alongside menstrual changes, a clinician may consider an FSH blood test as part of the assessment.
Age 45+
Symptoms and cycle changes often tell the story
In otherwise healthy people aged 45 or over, NICE recommends identifying perimenopause from symptoms and cycle changes rather than routinely using hormone blood tests. Hormonal contraception can make assessment more difficult.
An important reminder
Not every change in your 40s is automatically perimenopause.
These symptoms can occur for other reasons too. Noticing your pattern can help a healthcare conversation, but tracking is not a diagnosis.
When to speak to your GP
You do not need to wait until symptoms become unbearable.
Speak to your GP if you think you may be experiencing perimenopause and want to discuss your symptoms or options. In particular, make an appointment if:
- symptoms are affecting daily life, sleep, work or relationships
- your bleeding has become noticeably heavier
- you have palpitations or another new symptom that concerns you
- you are under 45 and think you may have menopause-related changes
- you have any vaginal bleeding after 12 months without a period
Perimenopause Clarity Plan
When everything feels connected, clarity starts with seeing the pattern.
The Perimenopause Clarity Plan gives you a structured way to record symptoms, notice changes over time and organise what you want to discuss, so you are not trying to remember everything in the moment.
Explore The Clarity Plan →EverGuide Studio
Perimenopause Clarity Plan
notice.
understand.
feel more prepared. ♡
Frequently Asked Questions
Can perimenopause start in your early 40s?
Yes. Menopause-related changes can begin before 45. Speak to your GP if you think this is happening, because early menopause may need further assessment.
What is usually the first sign?
A change in menstrual pattern is often one of the first signs, though some people first notice hot flushes, sleep problems or mood changes.
Do I need a blood test?
Not routinely if you are otherwise healthy and aged 45 or over. Between 40 and 45, an FSH blood test may sometimes be considered alongside symptoms and menstrual changes.
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Read the NHS guide to symptoms and NICE menopause guidance.
This article provides general educational information and is not a diagnosis or a substitute for personalised medical advice. If you are concerned about new, persistent or worsening symptoms, unusual bleeding or changes affecting daily life, speak to your GP or another qualified healthcare professional.