Perimenopause is a word you might have heard but not fully understood. It is the time when your body starts preparing for menopause, and it can bring some big changes. Understanding what happens during this stage can help you feel more prepared and less worried about the symptoms you might experience.
What Is Perimenopause?
Perimenopause means “around menopause.” It is the transition period before your periods stop completely. During this time, your ovaries slowly produce less of the hormones called oestrogen, progesterone, and testosterone. These hormones control many things in your body, so when their levels start to change, you notice the effects.
Most people experience perimenopause in their mid-40s, but it can start earlier for some women, sometimes in their late 30s. The perimenopause stage can last anywhere from a few months to up to 10 years before your periods stop altogether.
How Your Hormones Change
Think of your hormones like a thermostat that controls heating in a house. During perimenopause, this thermostat starts to become unreliable. Some days it works fine, and other days it goes up and down without warning.
Your oestrogen levels do not drop in a straight line. Instead, they go up and down unpredictably. This is why perimenopause symptoms can come and go, and why some months you might feel fine while others are more difficult.
Common Perimenopause Symptoms
Around 80% of women experience symptoms during perimenopause, and about 25% have symptoms that are severe enough to affect their daily life. Here is a table showing the most common symptoms and how they might affect you:
| Symptom | What It Feels Like | How Common |
|---|---|---|
| Hot flushes | Sudden feelings of heat in your face, neck and chest | Very common |
| Night sweats | Waking up sweating during the night | Very common |
| Irregular periods | Periods that are heavier, lighter, or come at different times | Very common |
| Sleep problems | Difficulty falling or staying asleep | Common |
| Mood changes | Feeling anxious, irritable, or low | Common |
| Brain fog | Trouble concentrating or remembering things | Common |
| Joint and muscle pain | Aches in your body that feel like stiffness | Common |
| Vaginal dryness | Less natural moisture, which can cause discomfort | Common |
| Changes to sex drive | Less interest in intimacy | Common |
| Weight changes | Gaining weight, especially around the middle | Common |
For more detailed information about these symptoms, the NHS has a helpful guide on menopause and perimenopause symptoms that explains what to expect.
How Perimenopause Affects Different Parts of Your Body
Your Reproductive System
The most obvious sign of perimenopause is changes to your periods. They might become irregular, happening more or less often than usual. The flow might be heavier or lighter. Eventually, your periods will stop completely, which marks the end of perimenopause and the start of menopause.
Many women also notice changes in their sexual health during the premenopausal years. Vaginal dryness, reduced interest in intimacy, and physical discomfort can all affect relationships and quality of life.
Your Brain and Mood
Oestrogen affects your brain in many ways. When levels drop, you might notice mood swings, feeling more anxious or sad than usual. Many women describe “brain fog,” which means having trouble thinking clearly or remembering things.
These mental health symptoms are real and not just “in your head.” The changing hormones genuinely affect how your brain works, which is why these symptoms can feel so frustrating.
Your Body Temperature
Hot flushes are perhaps the most well-known perimenopause symptom. They happen because your body’s temperature control becomes confused by the hormone changes. You might suddenly feel very hot, go red in the face, and start sweating. These episodes can last from a few seconds to several minutes.
Night sweats are hot flushes that happen while you sleep. They can wake you up feeling drenched in sweat, which then affects how tired you feel the next day.
Your Bones and Joints
Oestrogen helps keep your bones strong. When levels drop during perimenopause, your bones can start to lose some of their strength. This is why many doctors recommend getting enough calcium and vitamin D during this time.
Joint pain and muscle aches are also common. Some women feel stiff in the morning or notice that their joints hurt more than they used to.
Your Skin and Hair
You might notice your skin becomes drier or more prone to wrinkles. Your hair might thin or change texture. These changes happen because oestrogen helps keep skin elastic and hair healthy.
When Should You Seek Help?
It is worth speaking to a healthcare professional if your symptoms are affecting your daily life. There are treatments available that can help, including hormone replacement therapy (HRT), which replaces the hormones your body is no longer producing.
You should also speak to a doctor if:
- Your symptoms started before age 45
- You are experiencing symptoms that feel overwhelming
- You want to understand your options for managing symptoms
- You are interested in contributing to research that could help other women
How Clinical Research Is Helping
Scientists are working hard to better understand perimenopause and find new ways to help women during this transition. Clinical trials play an important role in this research by testing new treatments and approaches.
At 4MCS, we are running clinical trials for premenopausal women experiencing symptoms that affect their sexual health and relationships. By taking part in research, you can access specialist care while helping improve our understanding of how hormone changes affect women’s lives.
Research shows that up to 50% of women report sexual health concerns during perimenopause and menopause, yet this area has not been studied as much as it should be. Clinical trials help fill these gaps in knowledge.
Looking After Yourself During Perimenopause
While perimenopause is a natural process, there are things you can do to manage symptoms:
- Stay active: Regular exercise can help with mood, sleep, and weight management
- Eat well: A balanced diet with plenty of vegetables, fruits, and calcium-rich foods supports your body
- Prioritise sleep: Keep your bedroom cool and maintain a regular sleep schedule
- Talk about it: Sharing your experiences with others can help you feel less alone
- Seek support: Whether from your GP, a specialist, or through research participation, help is available
The Bottom Line
Perimenopause is a significant transition that affects nearly every system in your body. Understanding what is happening can make the experience less confusing and help you recognise that your symptoms are normal and shared by millions of other women.
If you are experiencing perimenopause symptoms, remember that you do not have to simply put up with them. Speak to a healthcare professional about your options, and consider whether participating in clinical research might be right for you. Your experiences matter, and by contributing to research, you can help improve care for women everywhere.
4MCS is a clinical research organisation based in Ilford, UK, with over 130 years of combined team experience in clinical trials. To learn more about our current studies or to register your interest, call 03300 575 838.
