Vaginal Discharge: Normal vs. Abnormal, Causes, and When to Seek Care

Vaginal discharge varies cyclically and individually. Understanding normal patterns helps identify concerning changes.

Normal Physiologic Discharge

• Volume: 1–4 mL/day (varies).
• Color: Clear to milky white.
• Consistency: Thin/watery (follicular) → stretchy/egg-white (ovulatory) → thick/pasty (luteal).
• Odor: Mild, not foul; acidic pH (3.8–4.5) from lactobacilli.
• No symptoms: No itching, burning, irritation, dyspareunia.

Abnormal Patterns & Common Causes

Presentation	Likely Cause	Key Features
Thick, white, clumpy (cottage cheese)	Vulvovaginal candidiasis	Intense itching, burning, erythema
Thin, gray-white, fishy odor	Bacterial vaginosis (BV)	pH >4.5, clue cells, +whiff test
Yellow-green, frothy, foul	Trichomoniasis	Strawberry cervix, motile trichomonads
Mucopurulent, cervical motion tenderness	Chlamydia / Gonorrhea	Often asymptomatic; PID risk
Blood-tinged, postcoital	Cervicitis, polyp, dysplasia, cancer	Requires speculum exam, Pap/HPV

When to See a Clinician

• New discharge with odor, color change, or symptoms.
• Persistent despite OTC antifungal (if yeast suspected).
• Multiple partners, new partner, or partner with STI.
• Pregnancy (some infections affect fetus).
• Postmenopausal bleeding/discharge.

Diagnosis

• pH paper, saline/KOH wet mount, whiff test, NAAT (CT/GC/TV), culture, Pap/HPV.

Hygiene

• External cleansing only (water/mild soap). No douching (disrupts microbiome).
• Cotton underwear; avoid tight synthetics.

Most abnormal discharge is treatable. Self-diagnosis often inaccurate—confirm with testing.