Recurrent Vaginal Infections? Here’s 5 reasons why.

If you're stuck in a cycle of vaginal infections, whether that's thrush, BV, or something else, that keep coming back no matter how many rounds of treatment you finish, you're not imagining it. This is incredibly common, and incredibly frustrating, especially when your tests come back "normal" or the treatment only works for a few weeks before symptoms return.

As a Naturopath specialising in vaginal health, I see this pattern all the time. The infection itself is usually not the whole story, it's what's happening underneath it that keeps letting it come back.

Here are 5 of the most common reasons I see behind recurrent vaginal infections:

1.Co-Infection

Sometimes what looks like one infection is actually two or more happening at once, such as BV alongside thrush or ureaplasma. If only one type of microbe is treated, then only half the picture was addressed (and therefore infection and symptoms continue). Proper testing is key here, so nothing gets missed! Below is an example of a BV overgrowth (Atopobium vaginae, Prevotella species) and Ureaplasma parvum overgrowth. Atopobium vaginae and Prevotella species are two of the main bacteria linked to BV and biofilm formation, while Ureaplasma parvum is a separate microbe that can sit alongside BV, contributing to inflammation and symptoms that don't fully resolve until it's also treated.

2.Biofilm and Inflammation

As mentioned above, some bacteria build a protective layer around themselves called a biofilm. This makes them hard for antibiotics and your immune system to reach. That's why symptoms can settle after treatment, then come back a few weeks later. This also keeps the tissue inflamed, which makes it easier for the next infection to take hold.

Breaking down biofilm is often a key part of actually resolving recurrent infections (rather than just managing flares!).

3.Hormones

Hormones, especially oestrogen, affect your vaginal environment differently depending on where it’s at:

→ Low oestrogen: thins the tissue, raises the pH = prone to BV or aerobic vaginitis

→ High oestrogen: increases glycogen in the tissue, which feeds yeast = prone to thrush

→ Larger fluctuations across your cycle (especially around ovulation): shifts the environment quickly, can trigger flares.

If you notice vaginal infections at the same point every cycle, or if you have recently experienced a hormonal shift (pregnancy, perimenopause, coming off contraception, etc) then I highly recommend getting a blood test done to check all of your hormones and taking them to a Naturopath for review and treatment!

4.Low Beneficial Bacteria

A healthy vaginal microbiome is dominated by protective Lactobacillus species that keep the pH low and crowd out pathogenic bacteria. This is one of the reasons I often recommend proper vaginal microbiome testing, so we can actually see what's going on, rather than guessing! Below is an example of very depleted beneficial bacteria. When Lactobacillus levels drop this low, the vaginal environment loses its natural protection, making it much easier for pathogenic bacteria to move in and take hold.

5.Partner Treatment

This one gets missed constantly! If your partner isn't treated alongside you, particularly with something like BV or thrush, reinfection can happen very quickly after you've finished your own treatment.

Depending on the type of infection, this might mean your partner also needs treatment, or avoiding sex (ideal) or using protection (bare minimum) during treatment.

When we stop guessing and start understanding why your infections keep coming back, thats where the real change happens.

If you’re wanting support with your vaginal health, I would love to work with you! You can book in for an initial consultation OR a free discovery call to learn more about how I can support you as a Naturopath.