Perimenopause is the transitional period before menopause, when hormone levels fluctuate and periods become irregular — it can last several years and typically begins in a woman's 40s, though it can start earlier. Munster Menopause Clinic provides specialist perimenopause assessment and treatment, including HRT, for women across Ireland who travel to our Tallow, Co. Waterford clinic.

15 symptoms to watch for:

1. Irregular periods

One of the earliest and most reliable signs. Your cycle may become shorter, longer, heavier, lighter, or simply unpredictable. Missing a period occasionally is common in perimenopause even if you are not pregnant.

2. Sleep problems

Difficulty falling asleep, waking in the early hours, or not feeling rested despite a full night's sleep. Often linked to falling progesterone levels, which has a calming effect on the brain. Many women notice this before any other symptom.

3. Anxiety

A sudden onset of anxiety — particularly in women with no previous history of it — is a hallmark of perimenopause. It may feel like a low-level background unease, or it may arrive as panic attacks. It is frequently misdiagnosed as a primary anxiety disorder and treated with antidepressants alone, without addressing the hormonal cause.

4. Low mood and depression

Feeling flat, tearful, or unlike yourself. Oestrogen plays a significant role in regulating serotonin, the brain's mood-regulating chemical. As oestrogen fluctuates, so can mood.

5. Brain fog

Difficulty concentrating, forgetting words mid-sentence, losing track of thoughts, feeling mentally slow. Many women describe this as one of the most distressing symptoms because it affects their confidence at work and in daily life.

6. Hot flushes and night sweats

The most well-known symptom. A sudden wave of heat, usually across the chest, neck and face, often followed by sweating and then chills. They can last from seconds to several minutes and may happen dozens of times a day.

7. Joint and muscle pain

Aching joints, stiffness in the morning, or a general feeling of physical soreness. Oestrogen has an anti-inflammatory effect, so as levels drop, many women notice joint pain they never had before. This is regularly investigated as early arthritis.

8. Heart palpitations

A fluttering, racing, or pounding sensation in the chest. Hormone fluctuations can affect the heart's electrical system. While palpitations should always be checked by a doctor to rule out cardiac causes, perimenopause is a common reason in women of this age group.

9. Headaches and migraines

Women who already experience migraines often find they worsen during perimenopause. Others develop headaches for the first time. The trigger is usually the fluctuation in oestrogen levels.

10. Changes to skin and hair

Skin may become drier, thinner, or more prone to breakouts. Hair may thin or shed more than usual. These changes are driven by falling oestrogen and can be distressing even when other symptoms are mild.

11. Vaginal dryness and discomfort

The tissues of the vagina and urethra thin and dry out as oestrogen falls. It can cause discomfort during sex, itching, and recurrent urinary tract infections. This is underreported because many women assume it is inevitable and untreatable. It is neither.

12. Low libido

Reduced interest in sex is extremely common and has both physical and psychological components. Vaginal discomfort, fatigue, low mood and falling testosterone levels all contribute.

13. Urinary symptoms

More frequent urination, urgency, or leaking when coughing or sneezing. These symptoms are often dismissed as 'just getting older' but are often hormonally driven and treatable.

14. Fatigue

A deep, persistent tiredness that does not resolve with rest. Often compounded by poor sleep, but also a direct effect of hormonal changes. Many women describe feeling exhausted in a way that is qualitatively different from ordinary tiredness.

15. Weight changes

Particularly an increase in abdominal fat even without changes to diet or exercise. The hormonal shift of perimenopause changes how the body stores fat, with more tending to accumulate around the middle.