Research into recurrent thrush is still limited, so not much is known about what causes it. However, there are several factors known to increase the risk of recurrent thrush, Dr Srikrishna explains. These are as follows:

Resistance to thrush treatment
Use of antibiotics
Using products that irritate the vaginal area, such as perfumed soaps
The menstrual cycle – hormonal changes can influence the pH level of the vagina, which can cause thrush to develop
Tight clothing, including thongs and jeans
Uncontrolled diabetes – high blood sugars can lead to recurrent thrush
Immunosuppression – which occurs with certain conditions, cancer treatments, steroid therapies and chronic illnesses
An increase in oestrogen levels (either naturally as in pregnancy or while taking the combined contraceptive pill)

Recurrent thrush: what causes it? And what treatment options are available?