Hair
Why is my hair shedding more in perimenopause?
Quick answer
More shedding — or hair that feels thinner — is common in perimenopause. As oestrogen and progesterone fluctuate and gradually fall, the hair growth cycle can shift, so more hairs rest and shed at once and regrowth can feel slower. Nutrition, stress, thyroid changes and sleep often overlap at the same life stage, which is why the picture is rarely about hormones alone. Tracking your shedding alongside your cycle, sleep and stress usually makes the pattern clearer than any single month.
What might be happening
Oestrogen helps keep hairs in their growing (anagen) phase for longer. As levels fluctuate and decline in perimenopause, more hairs can move into the resting phase and shed, and new growth can be finer. Some women also notice their hairline or parting looking wider, or hair feeling less dense overall.
Perimenopause rarely arrives alone. Iron and vitamin D can run low, thyroid function can change, sleep is often disrupted, and stressful life stages are common — all of which can affect the hair cycle. Two or three of these overlapping is more usual than a single cause.
Because hair changes are slow, the trigger often sits weeks or months upstream. Rather than judging one bad hair week, it helps to look back: what shifted in the months before the shedding increased?
What to notice
- When the shedding first increased, and whether it was gradual or sudden.
- Whether it's all over, or more noticeable at the parting, crown or temples.
- Other perimenopause signals in the same window — cycle changes, sleep, mood, hot flushes.
- Diet, especially iron-rich foods and overall protein.
- Recent stress, illness, or big changes to weight or routine.
- Any blood test results (ferritin, vitamin D, B12, thyroid).
Comparing photos and notes across a few months usually tells a clearer story than a single glance in the mirror.
Related patterns
Women noticing more shedding in perimenopause often also notice:
- irregular or changing periods
- disrupted sleep or 3am waking
- mood shifts or anxiety
- brain fog
- dry or changing skin
- lower energy
These don't always appear together, but seeing which ones move alongside your hair changes can make the pattern easier to understand.
Notice the pattern
Perimenopausal hair changes rarely happen in isolation. They tend to sit alongside shifts in your cycle, sleep and mood — the whole system is adjusting at once.
Tracking hair alongside those signals is often what separates a temporary, stress-driven shed from a longer-term hormonal pattern, and it makes conversations with a GP or menopause specialist far more useful.
When to get support
It's worth speaking with a GP if:
- shedding is heavy, sudden, or leaving obvious thin patches
- you have other symptoms like fatigue, heavy periods or unexplained weight change
- your scalp is sore, itchy or visibly inflamed
- hair loss is affecting your confidence or wellbeing
A GP can check for common contributors such as iron deficiency and thyroid changes, and discuss whether menopause-informed care would help. The British Menopause Society keeps a directory of specialists.