Short answer
Vaginal discharge is a normal self-cleaning system with lawful cyclical variation. And infection declares itself through persistent change from your baseline in color, consistency, amount, or odor, plus accompaniments like itching, burning, pain, or bleeding.
Learn your normal first (it varies more than most people realize), track changes against it, and let testing, not appearance, not anxiety, not internet photos, confirm infection.
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See Tests & Prices →Normal patterns across the cycle and life
- Ovulatory mucus: clear, stretchy, egg-white. Fertile-window discharge, heaviest mid-cycle.
- Luteal phase: thicker, whiter, scantier.
- Arousal transudate: clear wetness with sexual arousal, resolving after.
- Pregnancy leukorrhea: milky increases from hormonal shifts, normal unless accompanied.
- Postpartum lochia: weeks of evolving bleeding-to-discharge, normal in trajectory.
- Perimenopausal shifts: thinning patterns with dryness.
Healthy signature throughout: odorless to mildly musky, non-irritating, moderate. Roughly a teaspoon daily, varying cyclically.
Infection patterns with their tells
- BV: thin gray discharge with fishy odor, worse after sex or with menses.
- Yeast: thick white clumps with intense itching, minimal odor.
- Trichomoniasis: frothy yellow-green with odor and irritation.
- Chlamydia/gonorrhea: yellow-green discharge often with pelvic symptoms or bleeding changes.
- Retained tampon or condom: foul brown discharge. Urgent removal, not watchful waiting.
- STI vs non-STI reminder: color and consistency suggest, testing decides; overlaps are routine.
Self-assessment method that works
- Cycle tracking (apps or notes) establishing personal baselines across 2–3 cycles.
- Change-vs-baseline comparison. The question is “different from my normal?”, never “matches an ideal?”.
- Exposure context overlay. New partners, condomless exposures, and timing relative to last test.
- Accompaniment inventory. Itch, burn, pain, bleed, odor, fever, each steering urgency.
Bring tracked data to visits; it outperforms recall and prevents misdiagnosis from vague histories.
See Unusual Vaginal Discharge and STIs.
Evaluation without embarrassment
pH and amine (whiff) testing, microscopy distinguishing yeast/BV/trich patterns, NAAT by exposure risk, pregnancy testing where relevant, and cervical assessment for persistent unexplained changes.
The speculum exam is brief; the information density is high.
Douching beforehand obscures everything. Arrive unmodified.
When to seek care
For persistent changes from your baseline (not one unusual day), any accompaniments (itch, odor, pain, bleeding, fever), post-exposure changes regardless of appearance, and any changes in pregnancy. Where thresholds drop for two patients’ safety.