Symptom → lab tests
Which test should you get for abnormal vaginal discharge?
Short answer
Abnormal discharge almost always comes from one of three things — bacterial vaginosis, a yeast infection or trichomoniasis — and they look alike but need different treatments. The useful test is a single swab tested for all three at once; add chlamydia and gonorrhea testing with a new partner, and a urine test if there is burning or urgency.
Medically reviewed by Youmna DiStefano, MD · Last reviewed November 2026
When should you see a clinician instead of ordering a test?
- Discharge with pelvic or lower abdominal pain, fever or pain during sex — possible pelvic inflammatory disease; same-day care
- Discharge in pregnancy — test and treat through your obstetric clinician
- Bleeding between periods or after sex, or sores and blisters — an exam, not just a swab
- Discharge in a child or teenager under 18 — a clinician's evaluation
Why these tests for abnormal vaginal discharge?
A molecular (NAAT) swab names the organism: BV-associated bacteria, Candida species (including the ones that resist standard antifungals) and Trichomonas. Symptoms alone misclassify about half of cases — most self-diagnosed yeast infections turn out to be BV, which antifungals do not treat.
Chlamydia and gonorrhea cause discharge too, often with few other symptoms, and are missed by a vaginitis swab; with a new partner or any STI risk they are tested alongside. A urinalysis with reflex culture separates a urinary infection, which mimics and accompanies vaginitis.
If pregnancy is possible, an hCG test matters: BV and trichomoniasis in pregnancy are treated, and the drug choices change.
Which conditions do these tests help evaluate?
- Bacterial Vaginosis (BV) — One swab that tells BV, yeast and trichomonas apart — plus the STI tests to add with a new partner.
Which tests, and what do they cost?
Prices are cash-pay; every order adds one $6 lab processing fee. Physician authorization is included; no insurance or referral needed.
| Test or panel | Type | Price | Fasting | Results |
|---|---|---|---|---|
| STI Basic PanelSaves $5.99 vs ordering the tests separately | Panel · 2 tests | $84.99 | No | 2–5 business days |
| Vaginitis Panel (BV, Yeast & Trichomonas) | Test · 3 biomarkers | $149.99 | No | 1–3 business days |
| Chlamydia & Gonorrhea Test (RNA, Urine) | Test · 2 biomarkers | $51.99 | No | 1–4 business days |
| Urinalysis with Reflex to Culture | Test · 10 biomarkers | $19.99 | No | 2–4 business days |
| Pregnancy Test (Quantitative hCG) | Test | $26.99 | No | 1–3 business days |
| Syphilis Test (RPR with Confirmation) | Test · 2 biomarkers | $21.99 | No | 2–5 business days |
| HIV 1/2 Antigen & Antibodies Test (4th Gen) | Test · 2 biomarkers | $38.99 | No | 1–4 business days |
Common questions
What test should I get for discharge?
A vaginitis swab tested by nucleic-acid amplification for bacterial vaginosis, yeast and trichomonas — the three causes that produce the same symptom. On TestWell that is the Vaginitis Panel, self-collected in a private restroom at Quest with no pelvic exam. Add chlamydia and gonorrhea if there is a new partner, and a urinalysis if urinating hurts.
Can I tell BV from a yeast infection by the discharge?
Not reliably. Thin grey discharge with a fishy odor and little itching leans BV; thick white discharge with intense itching and no odor leans yeast — but the overlap is wide, trichomoniasis mimics both, and in studies about half of women who were sure they had yeast had something else. The swab settles it in one to three business days.
Do I need a pelvic exam to test discharge?
No. The molecular vaginitis and STI tests are validated on self-collected vaginal swabs, so you collect the sample yourself at the lab. An exam is still the right step when there is pain, fever, bleeding, sores or pregnancy.
Educational content, not a diagnosis. Lab results are one input; a clinician interprets them with your history and exam.