Hot flushes have become the shorthand for perimenopause, which is unfortunate because they are only one part of the picture and often not the first symptom. Many women spend years experiencing perimenopausal changes without realising what they are, partly because the wider list is rarely taught, and partly because the symptoms are easily attributed to stress, ageing, or 'just how life is right now'.
Recent research has confirmed something clinicians have observed for years. Symptoms often appear well before cycles become irregular. You can be in perimenopause with periods that still feel textbook.
Here are the symptoms that most often get missed.
Mood Changes and Anxiety
Mood-related symptoms are among the most common presentations of perimenopause and one of the most under-recognised. Women describe low mood, irritability that feels new, unexplained tearfulness, or a level of anxiety that was not there before. The decline and fluctuation in oestrogen affects serotonin and other brain chemicals, which is why perimenopause is a period of elevated risk for depression, particularly in women with a history of PMS, postnatal depression, or previous depressive episodes.
Being prescribed an antidepressant without perimenopause even being considered is a common experience. Antidepressants can help, but they are not always the right first answer.
Sleep Disruption
Sleep changes often start early, sometimes before any other symptom is obvious. Waking at three or four in the morning, difficulty falling back asleep, and lighter, less refreshing sleep are all common. Progesterone, which has a calming effect on the brain, declines earlier than oestrogen, which is part of why sleep quality drops so early in the transition.
Brain Fog and Cognitive Changes
Difficulty finding words, feeling less mentally sharp, forgetting things you would normally hold in your head. These are not imagined and not the beginning of dementia. Oestrogen has receptors (also known as ‘docking points’) throughout the brain and its fluctuation directly affects cognition. For most women, these cognitive symptoms settle after menopause, although they can feel disorienting during perimenopause.
Joint Pain
New aches, stiffness, or joint pain, particularly in the fingers, knees, or hips, can appear in perimenopause and are often attributed to age or exercise. Oestrogen has an anti-inflammatory effect, and its decline can unmask or amplify joint symptoms.
Palpitations and Heart-Related Symptoms
A fluttering feeling, skipped beats, or a racing heart can appear in perimenopause. These always need to be checked, since heart symptoms in midlife women are frequently under-investigated. Once cardiac causes are excluded, they are often hormonal.
Skin, Hair, and Body Changes
Drier skin, thinning hair, changes in body composition around the middle, and new sensitivities to alcohol are all common. These are often the first changes women themselves notice, before any medical framing of perimenopause has been offered.
When to Speak to Someone
If you are in your late 30s, 40s, or early 50s and any of these symptoms are affecting your quality of life, perimenopause deserves to be part of the conversation. Ask specifically. Symptoms are not always taken seriously the first time, and being prepared to advocate for a proper assessment is often part of the process.
Perimenopause does not need to be diagnosed through blood tests. It is a clinical diagnosis based on symptoms and cycle patterns. Knowing what to look for is the first step.