Bacterial vaginosis (BV) is one of the most common vaginal conditions in women and often causes symptoms like a strong fishy odor, thin discharge, irritation, and discomfort. BV develops when the natural balance of bacteria inside the vagina becomes disrupted, allowing harmful bacteria to outnumber the healthy bacteria that normally keep the vaginal environment stable.
Although BV is not always considered a sexually transmitted infection, certain behaviors and lifestyle factors can increase the risk of developing it. The good news is that BV is treatable, and many women can improve symptoms and reduce recurrences with a combination of medical treatment, vaginal microbiome support, and healthy lifestyle habits.
What Is Bacterial Vaginosis?
The vagina naturally contains a mixture of bacteria. Healthy bacteria, particularly Lactobacillus species, help maintain an acidic vaginal environment that prevents harmful organisms from multiplying.
Bacterial vaginosis occurs when this bacterial balance shifts and harmful bacteria begin to overgrow. As healthy bacteria decline, vaginal pH rises and creates an environment where odor-causing bacteria can thrive. This imbalance can lead to symptoms ranging from mild irritation to more noticeable odor and discharge.
BV is extremely common and can occur in women of all ages, although it is seen more frequently during reproductive years.
Symptoms of Bacterial Vaginosis
Some women with BV experience no symptoms at all, while others notice significant changes.
Common symptoms of bacterial vaginosis include:
- A strong fishy vaginal odor, especially after sex
- Thin gray, white, or off-white discharge
- Vaginal irritation or itching
- Burning during urination
- Increased vaginal moisture or discharge changes
The fishy odor associated with BV often becomes more noticeable after intercourse because semen temporarily raises vaginal pH, making the bacterial imbalance more apparent.
What Causes Bacterial Vaginosis?
Several factors can disrupt healthy vaginal bacteria and increase the risk of BV.
Vaginal pH Imbalance
Healthy vaginal bacteria prefer an acidic environment. When pH levels rise, harmful bacteria can grow more easily and overwhelm beneficial bacteria.
Multiple or New Sexual Partners
While BV itself is not classified as an STI, sexual activity can introduce changes in vaginal bacteria and alter the vaginal environment.
Douching
Douching can remove beneficial bacteria along with harmful bacteria, disrupting the natural balance that protects the vagina.
Hormonal Changes
Pregnancy, menstruation, menopause, and hormonal fluctuations may affect bacterial balance and vaginal pH.
Antibiotic Use
Antibiotics sometimes eliminate beneficial bacteria while treating infections elsewhere in the body, creating an opportunity for harmful vaginal bacteria to multiply.
Best Treatments for Bacterial Vaginosis
Treatment focuses on eliminating bacterial overgrowth and restoring a healthier vaginal environment.
Antibiotics
Prescription antibiotics remain the standard treatment for bacterial vaginosis. Medications such as metronidazole and clindamycin help reduce harmful bacterial growth and resolve active infections.
Because antibiotics target bacteria directly, many women notice symptom improvement within several days of treatment.
Boric Acid Suppositories
Boric acid suppositories are commonly used alongside treatment plans for women who experience recurring BV symptoms.
Boric acid helps support a healthy vaginal pH and creates an environment that is less favorable for harmful bacterial growth. Many women use boric acid to help maintain freshness and support a healthier balance of vaginal flora after treatment.
Probiotics
Probiotics help replenish beneficial bacteria that naturally support vaginal health.
Increasing Lactobacillus levels may help restore microbial balance and reduce the risk of recurring bacterial overgrowth. Probiotics can be obtained through foods or supplements designed specifically for vaginal health support.
Natural Home Remedies for BV Symptoms
Home remedies cannot replace medical treatment for active infections, but they may help support symptom relief and reduce recurrence risk.
Improve Intimate Hygiene Habits
The vagina naturally cleans itself, and aggressive washing can worsen bacterial imbalance. Washing only the external vulvar area with warm water and gentle fragrance-free cleansers may help reduce irritation without disrupting healthy bacteria.
Wear Breathable Clothing
Tight clothing and non-breathable fabrics can trap moisture and create conditions that encourage bacterial overgrowth. Cotton underwear and loose clothing improve airflow and help reduce moisture buildup.
Support Your Vaginal Microbiome
Diet and lifestyle habits may influence bacterial balance. Eating probiotic-rich foods and reducing excess sugar intake may help support healthier microbial diversity.
Why Does BV Keep Coming Back?
Recurring bacterial vaginosis is common and often occurs because the underlying vaginal environment never fully returns to balance after treatment.
Repeated antibiotic use, continued vaginal pH disruption, hormonal fluctuations, and persistent microbiome imbalance can contribute to recurrent symptoms.
For many women, long-term management focuses not only on treating bacterial overgrowth but also supporting the healthy bacteria that help prevent future episodes.
Can Bacterial Vaginosis Go Away on Its Own?
Some mild cases of bacterial vaginosis may improve naturally if the vaginal microbiome restores itself. Healthy bacteria can occasionally rebound and reduce harmful bacterial overgrowth without treatment.
However, BV often persists or returns because the underlying imbalance remains unresolved. Untreated bacterial vaginosis can increase the risk of recurring symptoms and may increase susceptibility to other infections. If symptoms continue beyond several days or become more severe, medical evaluation is recommended.
What Does Bacterial Vaginosis Smell Like?
One of the most recognizable symptoms of bacterial vaginosis is a strong fishy odor. Many women notice that the odor becomes more obvious after sexual intercourse because semen temporarily increases vaginal pH, which can make bacterial imbalance more noticeable.
The odor can range from mild to strong and may be accompanied by thin gray or white discharge. Not every woman with BV experiences odor, but when a fishy smell occurs without another obvious explanation, bacterial vaginosis is often considered one of the most common causes.
Bacterial Vaginosis vs Yeast Infection: What Is the Difference?
Bacterial vaginosis and yeast infections can cause similar symptoms, but they develop for different reasons and often feel different.
Bacterial vaginosis results from an overgrowth of harmful bacteria and commonly causes a fishy odor with thin discharge. Yeast infections occur because of fungal overgrowth and are more likely to cause intense itching, redness, and thick white discharge that resembles cottage cheese.
Understanding the difference matters because treatments that work for one condition may not improve the other.
| Symptom | Bacterial Vaginosis | Yeast Infection |
|---|---|---|
| Vaginal odor | Strong fishy smell | Mild or absent |
| Discharge | Thin gray or white | Thick white |
| Itching | Mild or sometimes absent | Often significant |
| Burning | Possible | Common |
| Cause | Bacterial imbalance | Yeast overgrowth |
Can You Have Sex with Bacterial Vaginosis?
Although bacterial vaginosis is not technically considered a sexually transmitted infection, sexual activity can sometimes worsen symptoms or contribute to recurring bacterial imbalance.
Intercourse may temporarily increase vaginal pH, which can make symptoms like odor more noticeable. Some women also experience more irritation or discomfort during active BV symptoms. Waiting until symptoms improve and treatment is completed can help reduce additional irritation.
Can Men Get Bacterial Vaginosis?
Men do not develop bacterial vaginosis because BV specifically affects the bacterial environment of the vagina. However, sexual partners can sometimes contribute to shifts in vaginal bacteria that may influence recurrence in women.
Researchers continue to study the role of partner-related bacterial transfer in recurring BV cases, particularly among women who experience repeated infections.
What Causes Recurring Bacterial Vaginosis?
Recurring bacterial vaginosis is common and can be frustrating because symptoms often return shortly after treatment.
Several factors can contribute to recurring BV including vaginal pH disruption, repeated antibiotic use, hormonal changes, douching, smoking, and incomplete restoration of healthy bacteria after treatment. Many women with recurrent BV benefit from focusing not only on treating harmful bacteria but also rebuilding a healthy vaginal microbiome.
How Long Does Bacterial Vaginosis Last?
Without treatment, bacterial vaginosis may last for weeks or longer depending on the severity of bacterial imbalance. Some women experience symptoms that improve temporarily only to return again later.
With treatment, many women begin noticing symptom improvement within several days, although restoring a healthier vaginal microbiome may take longer. Continuing supportive measures like probiotics and healthy vaginal habits may help reduce future episodes.
Can Boric Acid Help Bacterial Vaginosis?
Boric acid suppositories are commonly used by women who experience recurrent BV symptoms because they help support a healthy vaginal pH environment.
When vaginal pH becomes less acidic, harmful bacteria can grow more easily. Boric acid may help restore a healthier environment that supports beneficial bacteria while making conditions less favorable for bacterial overgrowth. Many women use boric acid as part of a broader prevention strategy alongside probiotics and medical treatment.
How Can You Prevent Bacterial Vaginosis Naturally?
Preventing BV often focuses on protecting the balance of healthy vaginal bacteria. Avoiding douching, using gentle fragrance-free products, wearing breathable clothing, and supporting beneficial bacteria through probiotics can all help maintain vaginal health.
While no prevention strategy completely eliminates risk, maintaining a stable vaginal environment can significantly reduce the likelihood of recurring bacterial imbalance and unwanted symptoms.
When to Seek Medical Care
You should contact a healthcare provider if you experience persistent vaginal odor, unusual discharge, pelvic pain, burning during urination, or symptoms that repeatedly return.
Because BV symptoms can overlap with yeast infections and sexually transmitted infections, proper diagnosis helps ensure that you receive the most effective treatment.
Conclusion
Bacterial vaginosis is a common condition caused by an imbalance in vaginal bacteria. While symptoms like fishy odor and discharge can be frustrating, effective treatments are available.
Combining medical care with microbiome support, healthy vaginal habits, and long-term prevention strategies can help restore balance and reduce the likelihood of future infections.
References
Centers for Disease Control and Prevention Bacterial Vaginosis (BV)
https://www.cdc.gov/bacterial-vaginosis/about/index.html
Cleveland Clinic Bacterial Vaginosis (BV): Symptoms, Causes and Treatment
https://my.clevelandclinic.org/health/diseases/3963-bacterial-vaginosis
Mayo Clinic Bacterial Vaginosis Symptoms and Causes
https://www.mayoclinic.org/diseases-conditions/bacterial-vaginosis/symptoms-causes/syc-20352279
Office on Women's Health Vaginal Infections
https://www.womenshealth.gov/a-z-topics/vaginal-infections
National Center for Biotechnology Information Role of Lactobacillus in Vaginal Health
https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9024683/
American College of Obstetricians and Gynecologists Vaginitis FAQ
https://www.acog.org/womens-health/faqs/vaginitis-and-vaginal-changes