Why have I suddenly got hayfever?

Some of my patients  are surprised when they seem to develop hayfever symptoms for the first time overnight during perimenopause or menopause. If you have suddenly developed hayfever in your 40s or 50s, it is very possible that hormonal changes are contributing.

In fact, it’s not that usual. Sneezing, itchy eyes, sinus congestion and increased sensitivity to pollen can all become more noticeable during this stage of life - even in women with no previous history of allergies. One of the reasons for this is the effect hormonal change has on the immune system.

Oestrogen plays an important role in regulating inflammatory and histamine responses within the body. As hormone levels fluctuate during perimenopause and decline after menopause, some women become more sensitive to histamine - the chemical released during allergic reactions.

At the same time, reduced oestrogen can affect the mucous membranes lining the nose and airways, making them drier, more reactive and more vulnerable to environmental irritants such as pollen, dust and pollution.

We also know that poor sleep, stress, increased inflammation and changes in gut health - all common during this shift - may further influence immune function and allergy symptoms.

While antihistamines can help manage symptoms, it is important to look at the wider picture:

✔️ Hormonal balance

✔️ Sleep quality

✔️ Nutrition and gut health

✔️ Inflammation and managing stress levels

✔️ Environmental triggers