Symptom Library
15 common perimenopause symptoms explained in plain language. What causes them, what may help, and when to see your GP.
Why it happens
Fluctuating oestrogen affects your hypothalamus — your brain's thermostat. It misreads your body temperature and triggers a heat response.
What may help
Dress in layers, avoid known triggers (alcohol, caffeine, spicy food), keep rooms cool. Ask your GP about MHT or non-hormonal options.
See your GP if
If hot flushes are disrupting your daily life or sleep significantly.
Why it happens
The same mechanism as hot flushes — but during sleep. You may wake drenched in sweat repeatedly through the night.
What may help
Cooling bedding, sleeping in layers, keeping your room below 18°C, reducing evening alcohol.
See your GP if
If night sweats are frequent and disrupting your sleep — this is very treatable.
Why it happens
As ovulation becomes less predictable, cycles become irregular — shorter, longer, heavier, lighter, or skipping entirely.
What may help
Track your cycle with an app or diary. Understanding your pattern helps you and your GP assess where you are in the transition.
See your GP if
If bleeding is extremely heavy, between periods, or you have pain. Always check unusual bleeding with your GP.
Why it happens
Oestrogen supports brain function. As levels fluctuate, many women experience difficulty concentrating, word-finding issues, or feeling mentally slow.
What may help
Sleep is the biggest lever — poor sleep worsens brain fog significantly. Regular exercise and reducing alcohol also help.
See your GP if
If cognitive changes feel severe or are affecting your work and relationships.
Why it happens
Oestrogen and progesterone influence serotonin and other mood chemicals. As they fluctuate, emotional regulation becomes harder — often feeling out of character.
What may help
Naming the hormonal connection is powerful. Regular exercise, good sleep, reducing stimulants, and talking therapy all help.
See your GP if
If mood changes are severe, persistent, or concerning to you or those around you.
Why it happens
New or worsening anxiety during perimenopause is very common and directly linked to hormonal changes — not just life stress.
What may help
Understanding the hormonal link is the first step. Breathwork, mindfulness, reducing caffeine, and physical activity can all help.
See your GP if
If anxiety is impacting your daily life — there are good treatment options available.
Why it happens
Progesterone supports deep sleep. As it declines, many women start waking at 3am or lose deep restorative sleep — even before other symptoms appear.
What may help
Consistent bed/wake times, cool dark room, no alcohol within 3 hours of bed, limiting caffeine after 2pm.
See your GP if
If sleep disruption is persistent and affecting your health and functioning.
Why it happens
A combination of poor sleep, hormonal shifts, and the metabolic impact of oestrogen decline can cause persistent tiredness that rest does not fully fix.
What may help
Prioritise sleep, exercise regularly (even short walks help), eat iron-rich foods if periods are heavy.
See your GP if
If fatigue is severe — your GP may want to check thyroid, iron levels, and vitamin D.
Why it happens
Oestrogen plays a role in cardiovascular function. Fluctuating levels can cause the heart to feel like it is racing, fluttering, or skipping — particularly around hot flushes.
What may help
Reducing caffeine and alcohol, managing stress, staying hydrated can reduce frequency.
See your GP if
Always mention palpitations to your GP, especially if frequent or accompanied by chest pain or faintness.
Why it happens
Oestrogen has an anti-inflammatory effect on joints. As levels fall, many women notice new or worsening aches — particularly in knees, hips, and hands.
What may help
Low-impact exercise (swimming, walking, yoga), anti-inflammatory foods, staying hydrated, maintaining a healthy weight.
See your GP if
If joint pain is severe, localised to one joint, or comes with swelling or redness.
Why it happens
Metabolic rate slows and fat distribution shifts — often from hips to abdomen — as oestrogen declines. This is physiological, not simply a lifestyle issue.
What may help
Strength training (maintains muscle mass and metabolic rate), a protein-rich diet, reducing processed foods and alcohol, adequate sleep.
See your GP if
If weight gain is rapid or unexpected, worth checking thyroid and metabolic function.
Why it happens
Oestrogen keeps vaginal tissues lubricated and elastic. As levels fall, the vaginal wall thins and dries — causing discomfort, particularly during sex.
What may help
Over-the-counter vaginal moisturisers used regularly (not just during sex) and lubricants can help. Localised oestrogen therapy is very effective.
See your GP if
This is very treatable — do not put up with it. Bring it up with your GP.
Why it happens
Testosterone (women have it too) declines during perimenopause and can reduce sexual desire. Vaginal dryness, fatigue, and mood changes compound this.
What may help
Addressing contributing factors (sleep, mood, vaginal comfort) often helps. Open communication with your partner and GP matters.
See your GP if
If reduced libido is affecting your relationship or wellbeing — your GP can discuss options including testosterone therapy.
Why it happens
Oestrogen supports hair growth and skin elasticity. As levels fall, some women notice hair thinning or skin becoming drier.
What may help
Gentle hair care, a diet rich in protein and iron, and good skincare. Discuss significant hair loss with your GP.
See your GP if
If hair loss is rapid or patchy — worth checking thyroid and iron levels too.
Why it happens
Many women find headaches worsen during perimenopause due to oestrogen fluctuations. Others experience new headaches for the first time.
What may help
Staying hydrated, consistent sleep, identifying and avoiding personal triggers, and managing stress.
See your GP if
If headaches are severe, frequent, or changing in character — especially with neurological symptoms.
Want to go deeper?
Our topic guides explain the underlying causes in more detail.