Short answer
Genital itching is a crowded symptom with a clear triage logic: yeast and contact irritation lead statistically, BV follows close behind, and STI causes (trichomoniasis, herpes prodrome, scabies, lice) are less common but more consequential.
Pattern (discharge?
sores?
odor?) plus exposure history decides whether home care, pharmacy antifungals, or clinical testing is the right next step.
Continue with Genital Sores: Possible Causes and Next Steps and Genital Rash: Possible Causes and When to Get Care for the directly connected guidance.
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See Tests & Prices →STI causes with distinguishing features
- Trichomoniasis itches with frothy discharge and odor.
- Herpes prodrome itches or tingles focally hours to days before blisters appear at the same spot. Location consistency is the clue.
- Scabies itches worst at night with thin burrow lines, often affecting partners simultaneously.
- Pubic lice itch with visible nits clinging to hair bases.
- Early LGV or syphilis irritate before their characteristic sores declare themselves.
Exposure history plus any of these patterns triggers STI testing, not stronger creams.
Non-STI causes with distinguishing features
- Vulvovaginal candidiasis (yeast): thick white clumps, intense itch, minimal odor.
- BV-associated irritation: thin gray discharge with fishy odor.
- Contact dermatitis: itching that started with a new soap, pad, detergent, latex product, or lubricant.
- Lichen sclerosus: chronic white crinkled patches, architectural change, biopsy-mandated. Not an STI and not treatable with antifungals.
- Heat, sweat, and friction: worse with synthetic underwear and activity.
- Pinworm migration: nocturnal anal-vulvar itching, mainly in households with children.
What helps vs what harms
Helpful: gentle fragrance-free hygiene, cotton breathable underwear, identifying and removing new products, cool compresses for acute relief, and (for confirmed yeast patterns) a single appropriate antifungal course.
Harmful: scratching (breaks skin, invites secondary infection), douching (worsens everything), scented washes, potent steroid creams without diagnosis (masking lichen disorders and infections), and repeated blind antifungal rounds that delay real diagnosis for months.
The antifungal decision rule
Use over-the-counter antifungals only with a yeast-consistent pattern: clumpy discharge, intense itch, no odor, no sores, no STI exposure risk, first or rare episode.
Outside that pattern, odor, sores, discharge changes, exposure history, pregnancy, diabetes, or recurrence, get diagnosed first.
The cream costs little; the delay it buys can cost fertility (missed PID) or months of untreated trichomoniasis.
When to seek care
Promptly for itching with discharge, sores, odor, exposure history, or persistence beyond a few days of appropriate care.
Urgently for severe swelling, ulceration, rapidly spreading inflammation, or pregnancy with symptoms.