A typical yeast infection is uncomfortable but not dangerous. About 75% of women will have at least one in their lifetime, and most clear up within a week or two with over-the-counter treatment. That said, ignoring one can lead to worsening symptoms, and in rare cases, yeast infections signal something else going on with your health that’s worth paying attention to.
Why Most Yeast Infections Aren’t Serious
A vaginal yeast infection happens when a fungus called Candida, which naturally lives in small amounts in the vagina, overgrows. The usual symptoms are itching, burning, and a thick, white, cottage cheese-like discharge. It’s annoying, sometimes painful, but it’s one of the most common infections women experience. Between 40% and 45% of women will deal with two or more episodes over their lifetime.
With treatment, whether a topical cream or a single oral pill, cure rates range from about 70% to 84% depending on severity and the medication used. Most people notice relief within a few days, and the infection fully resolves within one to two weeks.
What Happens If You Don’t Treat It
A yeast infection won’t resolve on its own in most cases, and leaving it untreated makes things progressively worse. The itching intensifies, the vulvar skin becomes more inflamed, and scratching can cause cracked, raw skin. Over time, untreated infections can lead to open sores, bleeding, and swelling. Those breaks in the skin create an entry point for bacteria, meaning you can end up with a secondary bacterial infection on top of the original yeast problem.
The discomfort also tends to snowball. What starts as mild itching can become constant burning that interferes with sleep, exercise, and sex. Treating it early is simpler and faster than trying to manage an infection that’s been brewing for weeks.
When a Yeast Infection Points to Something Bigger
One or two yeast infections a year is normal. But if you’re getting them frequently, it may be a sign your body is struggling to keep Candida in check. Diabetes is one of the most common underlying causes. When blood sugar runs high, excess sugar can show up in urine, creating an environment where yeast thrives. Women with diabetes, particularly those with poorly controlled blood sugar, face a noticeably higher risk of recurring infections.
A weakened immune system, whether from medication, chronic illness, or other factors, also makes recurrent infections more likely. If you’re dealing with yeast infections that keep coming back despite treatment, it’s worth getting bloodwork to rule out an underlying condition.
Make Sure It’s Actually a Yeast Infection
One of the real risks of a yeast infection isn’t the infection itself. It’s assuming you have one when you actually have something else. Bacterial vaginosis (BV) is the most commonly confused condition, and treating it with antifungal cream won’t help. The two look and feel different once you know what to watch for.
- Discharge: Yeast infections produce thick, white, clumpy discharge. BV causes thin, grayish discharge that’s often heavier in volume.
- Odor: Yeast infections typically have little to no odor. BV usually has a noticeable fishy smell, especially after a period or sex.
- Primary symptom: Yeast infections center on itching and burning. BV is more about the discharge and odor, with less intense itching.
Some sexually transmitted infections can also mimic yeast infection symptoms. If over-the-counter treatment doesn’t work within a week, or if you’re not confident in the diagnosis, getting tested gives you a clear answer and the right treatment.
Yeast Infections During Pregnancy
Pregnant women get yeast infections more often due to hormonal shifts that change the vaginal environment. The good news: a large analysis of over 33,000 women found no significant link between vaginal Candida and preterm birth or other adverse pregnancy outcomes. A yeast infection during pregnancy is a treatable nuisance, not a threat to the baby. However, not all medications are safe during pregnancy, so treatment options may be more limited.
The Rare but Serious Version
There is a form of yeast infection that is genuinely dangerous, but it looks nothing like a vaginal yeast infection. Invasive candidiasis occurs when Candida enters the bloodstream, joints, or organs. This happens almost exclusively in hospitalized patients who are already severely ill, often those with central IV lines, recent surgery, or profoundly weakened immune systems. About one in three patients with a Candida bloodstream infection die during hospitalization, though many of those deaths involve patients who were critically ill to begin with. Researchers estimate the infection itself is directly responsible for death in roughly 19% to 24% of cases.
This is not what happens when a regular yeast infection goes untreated for a few extra days. Invasive candidiasis requires very specific conditions that don’t apply to otherwise healthy people dealing with a vaginal infection at home. It’s worth knowing it exists, but it shouldn’t be a source of anxiety for someone with typical symptoms.