What Is Vaginal Dysbiosis? Understanding Vaginal Microbiome Imbalance
What Is Vaginal Dysbiosis?
"Vaginal dysbiosis occurs when the normal balance of microorganisms within the vaginal microbiome changes."
The vaginal microbiome is made up of billions of microorganisms that work together to maintain vaginal health. In many women, beneficial bacteria called Lactobacillus help maintain a healthy vaginal environment.
When the balance of these microorganisms changes, the vaginal ecosystem may become less stable. This change is known as vaginal dysbiosis.
Vaginal dysbiosis is not a disease itself. Instead, it describes an imbalance within the vaginal microbiome that may be associated with symptoms, recurrent infections or changes in vaginal health.
Some women experience symptoms, while others may have microbiome changes without any symptoms at all.
What Does a Healthy Vaginal Microbiome Look Like?
For many reproductive-age women, the vaginal microbiome is dominated by Lactobacillus species.
Common species include: Lactobacillus crispatus; Lactobacillus jensenii; Lactobacillus gasseri; Lactobacillus iners. These bacteria help maintain an acidic vaginal environment through the production of lactic acid. This acidic environment helps support vaginal health and may reduce the overgrowth of certain microorganisms.
However, there is no single "perfect" microbiome, and healthy vaginal microbiomes can vary between women.
What Happens During Vaginal Dysbiosis?
During vaginal dysbiosis, there may be a reduction in protective Lactobacillus bacteria and an increase in other microorganisms.
This change in the vaginal ecosystem may be associated with conditions such as:
Bacterial vaginosis (BV)
Aerobic vaginitis
Recurrent vaginal symptoms
Persistent vaginal discomfort
It is important to remember that not all microbiome changes cause symptoms.Some women may have vaginal dysbiosis without noticing any problems, while others experience recurrent symptoms that significantly affect their quality of life.
What Symptoms Can Vaginal Dysbiosis Cause?
Symptoms vary from person to person and may include:
Changes in vaginal discharge
Vaginal odour
Burning or irritation
Itching
Vaginal discomfort
Recurrent symptoms that improve temporarily and then return
These symptoms can overlap with many other vaginal conditions, which is why an accurate assessment is important.
What Causes Vaginal Dysbiosis?
There is rarely one single cause.
Many factors may influence the vaginal microbiome, including:
Antibiotic use
Hormonal changes
Menstrual cycle changes
Sexual activity
Pregnancy
Breastfeeding
Perimenopause and menopause
Vaginal products or irritants
Individual differences in the microbiome
For many women experiencing recurrent symptoms, multiple factors may be contributing at the same time.
How Is Vaginal Dysbiosis Assessed?
There is no single test or symptom that can diagnose all cases of vaginal dysbiosis. Assessment involves understanding the broader clinical picture, including your symptoms, medical history, previous investigations and factors that may be influencing your vaginal health.
A healthcare professional may consider:
The type of symptoms you are experiencing
When symptoms occur and whether there are identifiable triggers
Previous vaginal swabs or microbiological testing
Previous treatments and whether symptoms improved or returned
Hormonal factors, including contraception, perimenopause or menopause
Sexual and reproductive health history
Other medical conditions or medications that may influence vaginal health
Different investigations provide different types of information, and results should always be interpreted in the context of your individual symptoms, medical history and clinical presentation.
Vaginal Microbiome Testing: What Does It Tell Us?
As our understanding of the vaginal microbiome has evolved, more advanced testing methods have become available that may provide additional information about the microorganisms present within the vaginal environment.
Some vaginal microbiome tests may provide information about:
The presence and relative abundance of different Lactobacillus species
Bacterial diversity within the vaginal microbiome
Microorganisms associated with vaginal dysbiosis
Changes in the overall balance of the vaginal ecosystem
For some women experiencing recurrent or complex symptoms, this information may provide additional insight. However, vaginal microbiome testing remains an evolving field and results should always be interpreted alongside symptoms, medical history, standard clinical investigations and current evidence.
A test result alone does not determine a diagnosis or the most appropriate management approach.
Can Vaginal Dysbiosis Be Treated?
Management of vaginal dysbiosis depends on the individual, their symptoms, the underlying cause and current clinical evidence.
Because vaginal dysbiosis is not a single condition, there is no one-size-fits-all approach. Management may involve considering the type of microbiome imbalance present, the presence of specific conditions such as bacterial vaginosis (BV) or aerobic vaginitis, previous treatment history, hormonal influences and other potential contributing factors.
For many women experiencing recurrent symptoms, the goal is not simply to provide temporary symptom relief. A more comprehensive approach aims to understand why symptoms are recurring and identify the factors contributing to ongoing imbalance.
The Future of Vaginal Microbiome Research
Research into the vaginal microbiome is one of the most rapidly developing areas of women's health.
Scientists continue to explore:
How different Lactobacillus species influence vaginal health
The relationship between microbial diversity and symptoms
The role of biofilms in recurrent conditions
How hormonal changes influence the vaginal environment
New diagnostic and therapeutic approaches
As our understanding evolves, vaginal health is increasingly being viewed through the lens of the broader microbiome rather than a simple "infection versus no infection" model. This shift may help support a more personalised understanding of recurrent vaginal symptoms and vaginal health.
Key Takeaways
Vaginal dysbiosis describes a change or imbalance in the vaginal microbiome.
A healthy vaginal microbiome is commonly dominated by Lactobacillus species, which help maintain an acidic vaginal environment.
Changes in the vaginal microbiome may be associated with conditions such as BV, aerobic vaginitis and recurrent vaginal symptoms.
Factors such as antibiotics, hormones, sexual activity and individual differences may influence the vaginal ecosystem.
Some women may experience symptoms despite standard tests showing no obvious abnormality.
Assessment should consider the whole person, including symptoms, previous investigations, hormonal factors and medical history.
Vaginal microbiome research is rapidly evolving and may continue to change our understanding of recurrent vaginal symptoms.
The Bottom Line
Vaginal dysbiosis is a complex and evolving area of women's health. While changes in the vaginal microbiome may be associated with symptoms such as discharge, odour, burning or recurrent infections, every woman's vaginal environment is unique.
A single test result rarely tells the whole story. Understanding recurrent symptoms often requires looking at the broader picture, including symptom patterns, previous treatments, hormonal influences and individual health circumstances.
As research into the vaginal microbiome continues to develop, clinicians are gaining greater insight into the complex relationship between bacteria, the vaginal environment and women's health.
How I Can Help
I am Kylie Sayce, an endorsed Nurse Practitioner with extensive clinical experience in sexual and reproductive health and advanced training in the human microbiome.
Over the past three years, I have completed more than 30,000 telehealth consultations, including caring for women experiencing recurrent bacterial vaginosis, recurrent thrush, hormonal changes and complex vaginal symptoms.Many women who come to my clinic have:
Experienced recurrent BV, thrush or ongoing vaginal symptoms
Completed multiple courses of antibiotics or antifungal treatments with only temporary improvement
Been told their tests were "normal" but still continued to experience symptoms
Seen multiple healthcare providers without receiving clear answers
Felt frustrated, confused or unsure about what to try next
My approach focuses on understanding your individual history, reviewing previous investigations, considering potential contributing factors and developing an evidence-based management plan tailored to your situation.
If you are experiencing recurrent vaginal symptoms or concerns about your vaginal health, you can book a consultation to discuss your symptoms and explore the next steps.
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Medical Disclaimer
This information is intended for educational purposes only and does not replace individual medical advice, diagnosis or treatment. If you are experiencing symptoms, please seek personalised advice from an appropriately qualified healthcare professional.
