A High Vaginal Swab (HVS) Routine (often called a vaginal swab or HVS test) is a laboratory test used to check for common causes of vaginal infection and abnormal symptoms such as vaginal discharge, odor, itching, burning, or irritation. A clinician gently collects a sample of vaginal secretions using a sterile swab from the upper part of the vagina (the “high” vaginal area). The sample is then sent to the lab for analysis.

An HVS routine typically involves:

• Microscopic examination: A small amount of the sample is examined under a microscope to look for signs of infection such as yeast, clue cells, and increased white blood cells (inflammation).
• Culture (growth test): The sample may be placed on special media to help grow and identify bacteria or yeast that can cause infection, and in some settings guide treatment choices.
• Basic interpretation of vaginal flora: The lab may comment on whether the vaginal bacteria balance looks normal or suggests conditions like bacterial vaginosis.

What results mean (in plain language):

• No significant growth / normal findings: No clear infection was detected, or vaginal flora appears within expected range. If symptoms continue, your clinician may consider other causes (irritation, hormonal changes, skin conditions, or additional STI testing).
• Findings suggest bacterial vaginosis (BV): The natural balance of vaginal bacteria has shifted (often with reduced lactobacilli and overgrowth of other bacteria). BV commonly causes thin, gray/white discharge and a fishy odor.
• Yeast detected (Candida): Consistent with a yeast infection, often linked to thick white discharge and significant itching or burning.
• Inflammation present: Many white blood cells may indicate irritation or infection and may prompt further evaluation, including testing for sexually transmitted infections depending on symptoms and risk factors.

Because vaginal symptoms can overlap between different conditions, an HVS routine helps your clinician choose the most appropriate treatment rather than guessing. It supports accurate care in women’s health and the evaluation of infectious diseases affecting the vagina.

A High Vaginal Swab (HVS) Routine is commonly ordered when a person has symptoms that suggest a vaginal infection or an imbalance of normal vaginal bacteria. It may be requested by a gynecologist, primary care clinician, or sexual health clinic as part of a targeted evaluation.

Common reasons to do an HVS test include:

• Unusual vaginal discharge (new, increased, thick, watery, gray/white, yellow/green, or persistent discharge)
• Vaginal odor, especially a fishy smell that may be more noticeable after sex or during menstruation
• Itching, irritation, redness, or swelling of the vulva/vagina
• Burning or discomfort, sometimes with urination or during sex (which can occur with infections or inflammation)
• Recurrent or persistent symptoms despite over-the-counter treatments (for example, repeated presumed yeast infections)
• Pregnancy with symptoms: vaginal infections can sometimes increase the risk of complications, so accurate diagnosis matters
• After antibiotic use, which can disrupt normal vaginal flora and trigger yeast overgrowth
• Higher risk of sexually transmitted infection based on history, new partners, or exposure (your clinician may add specific STI tests—an HVS routine alone may not detect all STIs reliably)

In many clinics, an HVS routine is part of a broader work-up that may include a pelvic exam, pH testing, and targeted STI testing (such as NAAT tests for chlamydia and gonorrhea) when appropriate. Your clinician will interpret the HVS result alongside your symptoms and exam findings.

• Bacterial vaginosis (BV)
• Vulvovaginal candidiasis (Candida / yeast infection)
• Mixed vaginitis (more than one cause, e.g., BV plus yeast)
• Aerobic vaginitis (inflammatory bacterial imbalance, less common but important)
• Trichomoniasis (a sexually transmitted infection; may be suspected and sometimes seen on microscopy, though other tests can be more sensitive)
• Non-specific vaginitis / inflammation without a single clear organism identified

• Identify the cause of vaginal discharge and choose the right, targeted treatment
• Relieve symptoms such as itching, irritation, odor, and discomfort as quickly and safely as possible
• Reduce recurrence by confirming whether symptoms are due to yeast, bacterial vaginosis, or another cause
• Support sexual and reproductive health by detecting and managing infections early
• Protect pregnancy health by diagnosing treatable vaginal infections when symptoms occur
• Promote women’s health screening and infection control through accurate diagnosis rather than self-treatment