A yeast infection brings diffuse itching, burning, and a thick white discharge across the whole vulva, while genital herpes typically causes a cluster of painful blisters or sores in one spot. Yeast is a fungal overgrowth that isn't sexually transmitted; herpes is a virus spread through skin contact. Symptoms overlap, so a test tells them apart.
Candida
Herpes simplex virus
| Item | Value |
|---|---|
| Vaginal yeast infection (candidiasis) | curable — Candida |
| Genital herpes | managed — Herpes simplex virus |
What each one is
Vaginal yeast infection (candidiasis)
Vaginal yeast infection is a fungal overgrowth caused by Candida yeast, most often Candida albicans, a microbe that already lives quietly in the vagina until something tips the balance and lets it bloom CDC. It's one of the most common fungal infections, and because it's not usually acquired through sex, it's not classed as a sexually transmitted infection. Triggers include antibiotics, pregnancy, uncontrolled diabetes, and hormonal shifts that change the vaginal environment.
Genital herpes
Genital herpes is a viral infection caused by herpes simplex virus type 1 (HSV-1) or type 2 (HSV-2) CDC. Once you have it, the virus stays in nerve tissue for life and can reactivate periodically. It spreads through skin-to-skin contact, even when the carrier has no sores. Most people who carry HSV-2 never know they have it.
Symptoms compared
A yeast infection tends to announce itself as broad, persistent itching or soreness across the vulva, paired with a thick, white, often cottage-cheese-like discharge CDC. Sex can hurt, and urinating may sting as urine passes over irritated skin. Mild cases are just itchy. Severe ones bring redness, swelling, and even small cracks in the vaginal wall. There are no distinct blisters or open sores, and the discomfort spreads rather than sitting on a single lesion.
Herpes is localized rather than diffuse. The first outbreak is usually the worst, starting as small blisters that break open into painful sores, which take a week or more to crust over and heal CDC. That first episode often comes with flu-like illness — fever, body aches, and swollen glands in the groin. Sores show up on or around the genitals, rectum, or mouth. Repeat outbreaks are shorter and milder, and many people feel a warning prodrome of tingling, itching, or shooting pain in the area a day or two before sores appear. Most herpes infections cause no symptoms, so the majority of HSV-2 infections go undiagnosed.
How to tell them apart
The most useful distinction is the texture and pattern of what you feel. Yeast is itch-and-discharge that covers an area; herpes is pain-and-lesion in a defined spot. A few discriminating features:
- Discharge: thick, white, and odorless points toward yeast; herpes doesn't typically change discharge.
- Lesions: clustered blisters that open into raw sores point toward herpes; yeast causes redness and cracking but no distinct blisters.
- Whole-body signs: fever, aches, and swollen groin glands during a first episode point strongly to herpes.
- Course: yeast symptoms stay steady until treated; herpes sores follow a blister-to-crust-to-heal arc over a week or more.
- Recurrence pattern: yeast can return when triggers recur; herpes recurs from the same nerve site, often with a prodrome.
The symptoms overlap enough that you usually can't tell these apart by feel. Early herpes can itch, and a raw, cracked yeast infection can hurt. A test settles it. Don't self-diagnose a first episode of genital symptoms; the stakes are different for a lifelong virus than for a fungal overgrowth.
Side-by-side comparison
| Feature | Yeast infection (candidiasis) | Genital herpes |
|---|---|---|
| Cause | Candida fungus (usually C. albicans) | HSV-1 or HSV-2 virus |
| Sexually transmitted? | Not usually — not an STI | Yes, via skin contact |
| Main symptom | Diffuse itching, burning, thick white discharge | Clustered painful blisters/sores in one spot |
| Discharge | Thick, white, often cottage-cheese-like | Usually unchanged |
| Whole-body signs | None | Fever, aches, swollen glands (first outbreak) |
| Curable? | Yes, cleared with antifungals | No cure; antivirals control it |
| Recurrence | Common with triggers; some have 4+/year | From same nerve site; often a prodrome |
Testing
Yeast is confirmed by looking at vaginal discharge under a microscope — a wet prep with saline or 10% KOH that reveals budding yeast, hyphae, or pseudohyphae — and sometimes a fungal culture CDC, 2021. The vaginal pH stays normal (under 4.5), which helps separate yeast from bacterial vaginosis and trichomoniasis, both of which raise pH. Testing matters because the symptoms mimic those other vaginal infections.
Herpes is best confirmed when a sore is present: a clinician swabs the lesion for type-specific virologic testing — a NAAT or culture — which also tells you whether it's HSV-1 or HSV-2 CDC. Swab-based testing of an active lesion is the most reliable approach; blood antibody testing has a role but can't tell you where an infection is. In practice, testing is a urine sample, a self-collected or clinician swab, or a quick exam depending on what's suspected, and it's free or low-cost at health departments, Planned Parenthood, and Title X clinics. You can also get tested confidentially. If you're testing after a possible exposure rather than current symptoms, the timing matters — see when to test after exposure.
Treatment compared
Yeast infections are cured. An uncomplicated case responds to intravaginal azole creams (such as clotrimazole or miconazole, many sold over the counter) or a single oral fluconazole dose. Recurrent disease — four or more symptomatic episodes in a year — is handled differently: an induction course followed by months of weekly maintenance fluconazole controls symptoms in most women, though recurrences are common once maintenance stops, and stubborn cases sometimes involve a non-albicans Candida that resists the usual fluconazole RVVC review. If you get them repeatedly, it's worth learning the triggers and how to prevent yeast infections.
Herpes can't be cured, but it's well controlled. Three FDA-approved antivirals — acyclovir, valacyclovir, and famciclovir — shorten outbreaks and can be taken daily as suppression. Daily suppression does more than reduce your own outbreaks: in a randomized trial of serodiscordant couples, suppressive valacyclovir lowered the risk of passing HSV-2 to a partner by about 48% Corey et al.. Some people also explore alternative herpes treatments alongside standard care, though antivirals remain the evidence-based foundation.
Can you have more than one at once?
Yes. Yeast and herpes are unrelated organisms — a fungus and a virus — so having one doesn't protect you from the other, and the irritation of one can mask or mimic the other. Antibiotics taken for an unrelated reason can trigger yeast at the same time a herpes outbreak is brewing. If symptoms don't fully resolve with treatment for one, get re-evaluated rather than assume a single cause.
When to see a clinician
See a clinician for any first episode of genital sores, for symptoms that don't improve with over-the-counter yeast treatment, for recurrent yeast infections, or for fever and swollen glands alongside genital symptoms. Pregnancy, diabetes, or a weakened immune system also warrant a professional look. Because herpes sheds and spreads even without symptoms, a confirmed diagnosis lets you make informed decisions about suppression and partners.