Discharge that smells like cheese is most commonly caused by a yeast infection, which produces thick, white, cottage cheese-like discharge. About 75% of women experience a yeast infection at least once in their lifetime, so this is one of the most common vaginal complaints. But a cheesy smell can also come from a simpler, non-infectious cause: a buildup of natural oils and dead skin cells around the vulva.
Yeast Infections: The Most Likely Cause
A yeast infection happens when a fungus that normally lives in your body in small amounts grows out of control. Your vagina naturally contains both bacteria and yeast, and they keep each other in check. When that balance tips in favor of yeast, the result is thick, white, clumpy discharge that looks and sometimes smells like cottage cheese. You’ll usually also notice itching, burning, or soreness around the vulva.
The good bacteria in your vagina, called lactobacilli, make up about 95% of your vaginal flora. They produce lactic acid that keeps your vaginal pH between 3.8 and 4.2, acidic enough to suppress yeast and harmful bacteria. Anything that disrupts those bacteria (antibiotics, hormonal changes, a weakened immune system) can let yeast take over.
Smegma: A Simpler Explanation
Sometimes the cheesy smell isn’t coming from inside the vagina at all. Smegma is a combination of natural oils, dead skin cells, and sweat that builds up in the folds of your vulva. It looks like crumbly cheese and can smell sour, almost like sour milk. It’s not an infection, and it’s not dangerous on its own, but when it sits on the skin, bacteria feed on it and produce a stronger odor.
If the smell goes away after a thorough wash with warm water and unscented soap, smegma was likely the culprit. If the smell persists or comes with other symptoms like itching or unusual discharge texture, something else is going on.
How to Tell It Apart From Other Infections
Not every vaginal infection smells the same, and getting the distinction right matters because the treatments are completely different.
- Yeast infection: Thick, white, cottage cheese-like discharge. Often described as odorless or mildly yeasty/cheesy. Intense itching and burning are the hallmark symptoms.
- Bacterial vaginosis (BV): Thin, grayish, sometimes foamy discharge with a distinctly fishy smell. BV is actually more common than yeast infections, affecting roughly 23% of women with vaginal symptoms in clinical studies.
- Trichomoniasis: A sexually transmitted infection that produces thin, clear to greenish discharge with a fishy odor. It can also cause irritation and painful urination.
The key difference: a cheesy or bread-like smell points toward yeast, while a fishy smell points toward BV or trichomoniasis. If you’re unsure which you’re dealing with, a quick swab test at a clinic can tell you definitively.
Treating a Yeast Infection
If this is your first yeast infection, or if you’re not sure that’s what it is, getting tested before treating is worthwhile. Many women who self-diagnose turn out to have something else entirely.
For a straightforward yeast infection, over-the-counter antifungal creams and suppositories work well. Short courses of one to three days are effective for uncomplicated cases, though seven-day options are also available and tend to be gentler. A single-dose prescription pill is another option your provider can offer. Most people feel significant relief within two to three days of starting treatment, with full resolution in about a week.
If your yeast infections keep coming back (four or more times a year), that’s considered recurrent and needs a longer treatment plan, sometimes involving weekly oral antifungal medication for up to six months. Severe symptoms, infections during pregnancy, or infections caused by less common yeast strains also require adjusted treatment, so those situations warrant a visit to your provider rather than the pharmacy aisle.
Preventing the Smell From Coming Back
A few daily habits go a long way toward keeping your vaginal flora balanced and preventing both yeast overgrowth and smegma buildup:
- Wash your vulva with water and unscented soap. That’s all you need. Scented washes, wipes, and sprays can irritate the skin and disrupt your natural bacteria.
- Never douche. Douching flushes out the protective lactobacilli and creates the exact conditions that lead to infections.
- Wear cotton underwear. Synthetic fabrics trap heat and moisture, which yeast thrives in. Loose-fitting clothing helps the area stay dry.
- Wipe front to back. This prevents introducing bacteria from the rectum into the vaginal area.
If you notice a persistent cheesy smell that doesn’t resolve with good hygiene or a standard antifungal treatment, or if you also have fever, pelvic pain, or greenish discharge, those are signs that something beyond a simple yeast infection needs attention.