Is It Perimenopause or Something Else?

Medical Writer: Janefrances Ugochi Ozoilo, MBBS, FMCPH, MSc (PH), PMP

Medical Reviewer: Azuka Chinweokwu Ezeike, MBBS, FWACS, FMCOG, MSc (PH)

Highlights

• Perimenopause is the natural hormonal transition before menopause, usually starting in your mid-40s and lasting 4 to 8 years.
• A key sign is a menstrual cycle changing by more than 7 days, often with hot flashes, night sweats, poor sleep, mood swings, and brain fog.
• Symptoms are similar to those of thyroid disease, depression, anaemia, diabetes, and pregnancy, so a medical examination is important.
• You can still get pregnant during perimenopause, so contraception is advised for 12 to 24 months after your last period.
• Diagnosis is mainly clinical, based on age, symptoms, and cycle changes, with blood tests used only to rule out other conditions.
• Symptoms are manageable with hormone therapy, non-hormonal medications, and lifestyle changes.

Introduction

If you are in your late 30s to early 50s and suddenly feel like your body is not quite your own, you are not alone. Maybe your periods show up a week early and then disappear for a month, or you suddenly feel a wave of heat through your body. Perhaps you're waking up at 3 a.m. and cannot get back to sleep, or you find yourself irritated at things that would not usually bother you. You are definitely not imagining it. For many women, this is the start of perimenopause.

Perimenopause is the phase when your ovaries start to wind down their production of oestrogen and progesterone. This typically begins in your mid-40s, though some women may observe changes as early as their late 30s. It ends a year after your last period. On average, this change can range from 4 to 8 years, but it varies widely from person to person.

Perimenopause can be a bit confusing because its symptoms often overlap with other conditions. Conditions such as thyroid issues, depression, anxiety, iron-deficiency anaemia, and even early pregnancy can all feel like perimenopause. That is why many women find themselves asking, "Is this normal, or is there something else going on?"

This article covers the common signs of perimenopause, conditions that could resemble it, what doctors look for when making a diagnosis, and treatments and lifestyle changes that can help. The aim here is to give you a clearer picture, so you can have a good conversation with your doctor and feel more comfortable with the changes you are experiencing.

Common Signs and Symptoms of Perimenopause 

Perimenopause eventually progresses to menopause. Early signs and symptoms include:

• Change in the length of days of your Menstrual Cycle

The first and most reliable sign of perimenopause is when your cycle starts changing by 7 or more days from one period to the next. If you observe that you now miss your period for 60 days or more, it means perimenopause has progressed. During this time, your periods might get heavier or lighter, longer or shorter, or switch between all of these in no specific pattern.

• Hot flashes and night sweats 

These are collectively called vasomotor symptoms and are the most recognisable features of the change. For some women, they are mild and occasional; for others, they disrupt work, sleep, and intimacy.

• Sleep Disturbance

Some women wake up soaked in sweat, while others just find themselves wide awake at 3 a.m. without a reason.

• Mood Changes

Mood swings are quite common, especially during menopause. You might notice feelings like irritability, anxiety, or even a low mood setting in.

• Mental Cloudiness

This is also called brain fog. Women talk about feeling mentally foggy, like when you walk into a room and forget why you are there, or cannot find the right words mid-sentence. Concentrating can be tough, too. These experiences are often tied to changes in oestrogen. For most women, these symptoms are temporary and not a sign of dementia.

• Vaginal Dryness 

This symptom often results from low oestrogen levels, leading to vaginal dryness, which can cause discomfort and increase the risk of irritation or infections like Urinary Tract Infections (UTIs).

• Painful Sex 

This is also known as dyspareunia. Pain during intercourse often happens because the vagina is dry or the tissues inside have changed, making sex uncomfortable or painful. This can really affect intimacy and your overall quality of life. 

• Lower libido 

Reduced hormone levels of oestrogen and progesterone can contribute to reduced sexual desire, affecting your emotional well-being and relationships.

• Joint and muscle aches 

These are also related to hormonal changes and affect your musculoskeletal health, leading to generalised pain or stiffness.

• Weight gain 

Changes in metabolism and fat distribution due to hormonal shifts often lead to fat accumulation around your stomach. This can increase health risks, such as cardiovascular disease.

• Headaches 

Hormonal changes can trigger headaches or migraines, affecting your daily functioning and comfort.

• Changes in skin and hair 

Reduced oestrogen can lead to skin thinning, dryness, and hair changes. Your hair becomes thinner and more brittle, affecting your appearance and self-esteem [1,2,3].

What Other Health Conditions Can Cause Similar Symptoms?

Perimenopause causes many vague symptoms, so it can be mistaken for other conditions.  This is why it is important to see your clinician instead of assuming every new symptom is hormonal.

• Thyroid Disease

Both an underactive thyroid (hypothyroidism) and an overactive thyroid (hyperthyroidism) can lead to irregular periods, mood swings, sleep issues, hair thinning, weight changes, and sweating episodes similar to hot flashes. Thyroid problems are also more common in women in their 40s and 50s, so both conditions can happen at the same time [4].

• Depression and Anxiety Disorders

Low mood, fatigue, poor concentration, and disrupted sleep are common in both major depression and during perimenopause. Panic attacks and hot flashes can feel very similar, with sudden heat, a racing heart, and a feeling of dread, and they can sometimes happen at the same time.

• Iron-Deficiency Anaemia  

Heavy bleeding during perimenopause can reduce iron levels, causing tiredness, difficulty in breathing, heart palpitations, and brain fog, which might be confused with hormonal symptoms. A simple blood test can detect this quickly.

• Polyendocrine Metabolic Ovarian Syndrome  (PMOS)  

PMOS can cause irregular menstrual cycles that coincide with perimenopausal changes.

• Diabetes and Prediabetes  

These conditions can lead to tiredness, frequent urination, and mood changes similar to hormonal symptoms.

• Obstructive Sleep Apnoea  

This leads to poor sleep, daytime tiredness, and irritability, and often worsens with weight changes in midlife.

• Autoimmune Conditions  

Conditions like lupus erythematosus or rheumatoid arthritis can cause joint pain and fatigue, which are similar to perimenopausal symptoms.

• Certain Medications and Substance Use  

Some medications and substance use habits can cause symptoms that imitate or worsen hormonal changes. Antipsychotic medications such as haloperidol, risperidone, and olanzapine can cause hot flashes and irregular menstrual periods. Substances like alcohol, caffeine, nicotine and cannabis can imitate and worsen symptoms of perimenopause.

• Genitourinary Infections  

Sexually transmitted infections and urinary tract infections can cause genitourinary symptoms similar to those in perimenopause.

• Pregnancy  

Pregnancy can cause similar symptoms and should not be ignored as a possibility. 

Can Pregnancy Still Occur During Perimenopause?

Many women often wonder about this, and it is a common concern. The answer is “Yes.” You can still get pregnant during perimenopause as long as you're having periods, even if they're irregular.If you're between 40 and 44, your chances of getting pregnant naturally are about 30% per year. For those aged 45 to 49, it's around 10% per year [3]. Ovulation during perimenopause is difficult to predict, so standard tracking methods may not work well.

Pregnancy at this stage comes with higher risks, like miscarriages, high blood pressure, gestational diabetes, and chromosome abnormalities. So, women over 50 should keep using contraception for 12 months after their last period. If you had your final period before turning 50, continue for 24 months. Options like barrier methods, copper IUDs, and sterilisation are good choices [5].

How Do Doctors Diagnose Perimenopause?

Perimenopause is usually diagnosed through a clinical examination, focusing on your age, symptoms, and any changes in your menstrual cycle, rather than relying on blood tests. If you're 45 or older and experiencing the usual symptoms, you probably will not need laboratory tests as long as you're otherwise healthy.

During perimenopause, the levels of hormones like Follicle Stimulating Hormone (FSH) , Luitenising Hormones and estradiol can vary so much that a single test is not enough to give a reliable diagnosis. FSH testing is useful for diagnosing women aged 40-45 who are experiencing menopausal symptoms. If you're under 40 and have irregular or absent periods along with menopausal symptoms, two FSH tests spaced 4-6 weeks apart can be used to make a diagnosis. Other tests might be needed to rule out conditions that mimic perimenopause, such as;

• Thyroid function tests
• Full blood count
• Iron level testing
• Fasting glucose or HbA1c
• Pregnancy test

If there's abnormal bleeding, a pelvic ultrasound scan or endometrial biopsy might be necessary.

When Should You See a Doctor About Your Symptoms?

Recognising when it is time to consult a doctor during perimenopause can really make a difference. Below are key warning signs and symptoms that signal it is time to see a doctor.Seek prompt care if you are  : 

• Soaking through a pad or tampon every hour for two consecutive hours.
• Passing large blood clots.
• Bleeding lasting more than seven days.
• Periods occurring more frequently than every 21 days.
• Bleeding between menstrual periods.
• Bleeding after having sexual intercourse.
• Any vaginal bleeding more than 12 months after the last period.

Other reasons to see your doctor include;

• Hot flashes or night sweats that disturb sleep, work, or relationships.
• Mood swings that seem excessive or involve thoughts of self-harm.
• Pelvic pain, painful sex, or frequent urinary issues.
• Constant tiredness, fast heartbeat, shortness of breath, or unexplained weight changes [6].

If you're having thoughts of suicide or feel like you're in a crisis, reach out to a local crisis line or emergency service immediately.

What Treatments Can Help With Perimenopause Symptoms?

Managing perimenopause symptoms does not mean putting up with discomfort or waiting for things to settle on their own; more effective options are available than ever before. Whether you seek hormonal or non-hormonal options, the right treatment plan can be tailored to your symptoms, medical history, and personal preferences.

Hormonal Options

• Menopausal Hormone Therapy (MHT), also known as Hormone Replacement Therapy, is still the best way to manage hot flashes, night sweats, and genitourinary symptoms. It also helps keep your bones strong. If you have had your womb removed through a hysterectomy, you will only need to take oestrogen. If your womb is still there, you will need to combine oestrogen with progestogen to protect the uterine lining. 
• Transdermal options of hormone therapy, like patches and gels, are less likely to cause blood clots compared to oral pills. They're often recommended for women who have migraines, are overweight, or have had clotting issues in the past.
• Using low-dose vaginal estrogen, whether as a cream or a ring, works really well for dealing with vaginal dryness, painful sex, and frequent urinary issues. It's generally safe for most women, even for those who cannot use systemic hormone therapy. 

Non-Hormonal Options

• For women who cannot use hormonal treatments, non-hormonal options like citalopram, desvenlafaxine, escitalopram, gabapentin, paroxetine, and venlafaxine are available. These can reduce the frequency of vasomotor symptoms by about 40% to 65%.
• Using vaginal moisturisers and lubricants regularly can really help provide relief. 

10 lifestyle changes that may help during perimenopause

1. Physical activity

Regular physical activity is beneficial. Try including aerobic exercises such as brisk walking, cycling, or swimming, along with resistance training, at least twice a week. This can help boost your mood, improve your sleep, and support heart health and bone density.

2. Adequate nutrition

Eating well does not mean you have to completely change everything. Starting with vegetables, fruits, whole grains, legumes, nuts, fish, and olive oil, while cutting back on ultra-processed foods and red meat, is a great way to begin. Though the evidence is limited, Soy based products contain plant estrogens and may help relieve some menopausal symptoms. 

3. Vitamins and minerals Supplementation

It is important to get enough calcium, about 1,000 to 1,200 mg a day, along with vitamin D, to keep your bones strong during this time.

4. Reducing Substance Use

Reducing how much alcohol and caffeine you consume can really help lower the number of hot flashes you experience and make it easier to get a good night's sleep for a lot of women. 

5. Quitting Smoking

Quitting smoking is a great choice to make. Smoking is linked to reaching menopause earlier and experiencing more intense symptoms. 

6. Improving Sleep Habits

Getting good sleep can really help when your nights are already a bit chaotic. Try keeping your bedroom cool and dark, use bedding you can easily adjust, and make sure to wind down before bed without any screens. Avoid heavy meals, alcohol, and intense exercise too close to bedtime, as these can make an already restless night worse.

7. Stress management 

Stress management is worth taking seriously at this stage. Practices such as yoga, mindfulness meditation, paced breathing, and Tai Chi have evidence for improving sleep and reducing the distress caused by hot flashes.

8. Social connections and therapy

Building social connection, talking openly with friends or a partner, and asking for help when you need it can be quietly transformative in ways that are easy to underestimate. Working with a therapist, particularly one trained in cognitive behavioural therapy or midlife transitions, can be one of the most useful steps you take. 

9. Comfort strategies

Making a few small changes around you can really help, like wearing layered clothes made from breathable fabrics, keeping a little fan close by, and having some cool water handy all day long. 

10. Symptom  tracking

Keeping track of your symptoms in a notebook or app can really help you notice patterns over time. It also gives you something solid to discuss with your doctor.

Conclusion

Perimenopause is a natural phase in life, but you do not have to just endure it without support. Your symptoms are genuine and deserve attention, especially if they're affecting your sleep, relationships, or daily activities. There are options like hormone therapy, new non-hormonal medications, behavioural therapies, and lifestyle adjustments that can help you feel more like yourself. It's important to speak up, ask questions, and collaborate with a healthcare provider who listens, because you know your body best and deserve care that respects that.

References

[1] Santoro N, Roeca C, Peters BA, et al. The Menopause Transition: Signs, Symptoms, and Management Options. The Journal of Clinical Endocrinology & Metabolism 2021; 106: 1–15. Available from: https://pubmed.ncbi.nlm.nih.gov/33095879/

[2] Duralde ER, Sobel TH, Manson JE. Management of perimenopausal and menopausal symptoms. BMJ 2023; 382: e072612. Available from: https://pubmed.ncbi.nlm.nih.gov/37553173/

[3] Fang Y, Liu F, Zhang X, et al. Mapping global prevalence of menopausal symptoms among middle-aged women: a systematic review and meta-analysis. BMC Public Health 2024; 24: 1767. Available from: https://pubmed.ncbi.nlm.nih.gov/38956480/

[4] Mintziori G, Veneti S, Poppe K, et al. EMAS position statement: Thyroid disease and menopause. Maturitas 2024; 185: 107991. Available from: https://pubmed.ncbi.nlm.nih.gov/38658290/

[5] Overview | Menopause: identification and management | Guidance | NICE, Available from:  https://www.nice.org.uk/guidance/ng23 

[6] Cunningham AC, Hewings-Martin Y, Wickham AP, et al. Perimenopause symptoms, severity, and healthcare seeking in women in the US. npj Women's Health 2025; 3: 12. Available from: https://www.nature.com/articles/s44294-025-00061-3

Disclaimer:
The information provided on this website is for general educational and informational purposes only. It is not intended to replace professional medical advice, diagnosis, or treatment. Always seek the advice of your physician or other qualified health provider with any questions you may have regarding a medical condition.

Published June 24, 2026