How do I know if it's a UTI or a yeast infection?

The clearest tell is where the discomfort is. A UTI causes burning or pain when you urinate, plus needing to go often and urgently, with no vaginal discharge or itching. A yeast infection causes vaginal itching and a thick, white, odorless discharge. If you are not sure, get tested, because they need completely different medicines.

What does BV smell like, and how is it different from a yeast infection?

BV usually causes a thin, grayish-white discharge with a strong fishy odor that is often more noticeable after sex, and usually little or no itching. A yeast infection is the opposite: intense itching with a thick, white, cottage-cheese-like discharge and no bad smell. Odor is the biggest clue, fishy points to BV, no odor points to yeast.

Can I just use Monistat or another over-the-counter yeast medicine to be safe?

Not without being reasonably sure it is yeast. Antifungal creams treat only yeast and do nothing for BV or a UTI, both of which need antibiotics. Studies show about two-thirds of women who buy over-the-counter yeast medicine do not actually have a yeast infection, so guessing wrong just delays the right treatment.

Is BV a sexually transmitted infection? Did I do something wrong?

BV is not a classic STI and it is not caused by poor hygiene. It happens when the normal balance of vaginal bacteria shifts. It is very common and nothing to be embarrassed about. New or multiple partners and douching can raise the risk, but BV also occurs in people who are not sexually active.

Can I have more than one of these at the same time?

Yes. It is possible to have BV and a yeast infection together, or a vaginal infection alongside a UTI. That overlap is part of why self-diagnosis is unreliable and testing is worthwhile when symptoms are confusing or do not clear up.

Do I always need to see a clinician, or can some of these clear on their own?

See a clinician for a first-time episode, symptoms you cannot confidently identify, symptoms that recur or do not improve, or any urinary symptoms, since an untreated UTI can move to the kidneys. A previously diagnosed, textbook yeast infection is the one case where many people reasonably self-treat with an over-the-counter antifungal.

Women's Health

UTIs, Yeast Infections, and BV: Telling Them Apart

Burning, itching, or a new odor? A clear, judgment-free guide to telling a UTI, a yeast infection, and BV apart, plus when to get seen.

Morningside Medical Team

Reviewed by Mary Ojo-Carons, MD, Women's Health

Telling them apart at a glance

The fastest way to sort out a UTI, a yeast infection, and bacterial vaginosis (BV) is to notice where the discomfort is and whether there is an odor. A UTI is a urinary problem: burning when you pee, urgency, and no discharge. A yeast infection means intense itching with thick, white, odorless discharge. BV means a thin gray discharge with a fishy smell and usually little itching.

These three are extremely common, they overlap, and telling them apart matters because they need different treatments. Here is how to read the signs, and when it is time to be seen.

Key takeaways

A UTI causes burning during urination, urgency, and frequency, with no vaginal discharge.
A yeast infection causes itching and a thick, white, cottage-cheese-like discharge that does not smell bad.
BV causes a thin gray discharge with a strong fishy odor, often worse after sex, and usually less itching.
Yeast responds to antifungals; BV and UTIs need antibiotics, so using the wrong product just delays real relief.
Self-diagnosis is often wrong, so a first-time or confusing episode is worth a quick clinic visit.

What each one actually is

A UTI is an infection of the urinary tract

A urinary tract infection affects your bladder and urinary system, not your vagina. The hallmark is pain or burning when you urinate, along with urgency, frequency, and sometimes lower-belly pressure or blood in the urine. There is no vaginal discharge. UTIs are caused by bacteria and are treated with antibiotics.

A yeast infection is an overgrowth of Candida

A yeast infection (vulvovaginal candidiasis) happens when the fungus Candida overgrows. The main signs are intense itching, redness, swelling, and a thick, white discharge that looks like cottage cheese and does not have a bad odor. It can sting when urine passes over irritated skin, which is one reason it gets confused with a UTI. About 75% of women have at least one yeast infection in their lifetime.

BV is a shift in vaginal bacteria

Bacterial vaginosis is not an infection you catch, and it is not about hygiene. It happens when the normal balance of bacteria in the vagina shifts. The most telling sign is a thin, grayish-white discharge with a strong fishy odor, often stronger after sex, usually with little itching. BV is the most common vaginal condition in women ages 15 to 44, and many people who have it notice no symptoms at all.

How do I tell them apart?

Use these three questions:

Where is the discomfort? Burning when you pee with urgency points to a UTI. Itching and irritation around the vulva and vagina point to yeast or BV.
Is there discharge, and what does it look like? No discharge suggests a UTI. Thick and white like cottage cheese suggests yeast. Thin and gray suggests BV.
Is there an odor? No odor points to yeast. A strong fishy smell points to BV.

Keep in mind that symptoms overlap and you can have more than one at once, so these clues narrow things down but do not replace testing when things are unclear.

Why does getting it right matter?

Because the treatments are different. Yeast infections respond to antifungal creams or a pill; BV needs antibiotics like metronidazole; and a UTI needs antibiotics too. An antifungal cream does nothing for BV or a UTI.

This is why guessing is risky. About two out of three women who buy over-the-counter yeast medicine do not actually have a yeast infection, and self-diagnosis is often inaccurate because the symptoms are so similar. In the clinic, a quick check of vaginal pH, a whiff test for odor, and a look under the microscope can sort it out the same day.

When can I treat it at home, and when should I be seen?

If you have had a yeast infection before and this feels exactly the same, an over-the-counter antifungal is reasonable. For most other situations, a visit is the safer call.

See a clinician if:

It is your first-ever episode of vaginal symptoms
You have any urinary symptoms, since a suspected UTI should always be checked
Symptoms do not improve with treatment, or keep coming back
You are pregnant, or have diabetes or a weakened immune system
Discharge comes with pelvic pain, fever, or sores

Get care promptly if a suspected UTI comes with fever or chills, back or side pain, or nausea and vomiting. Those can mean the infection has reached the kidneys, which needs prompt treatment. High fever with shaking chills, severe vomiting, confusion, or fainting are reasons to seek emergency care.

We are here, no embarrassment needed

Symptoms like these are common, treatable, and nothing to feel awkward about. Our women's health team offers warm, judgment-free care and can test, diagnose, and treat all three of these conditions quickly, so you get the right relief the first time.

This article is for general information and is not a substitute for professional medical advice. Talk to your clinician about your specific situation.

Ready to get checked and feel better? Book an appointment with our team today.