Yeast Infection Symptoms: How to Recognize One and What to Do

What does a yeast infection actually feel like?

The hallmarks are intense itching or burning in the vulva and vagina, a thick white clumpy discharge often compared to cottage cheese, redness or swelling at the vaginal opening, and sometimes a burning sensation during urination or intercourse. Crucially, yeast infection discharge typically has no strong odor. If a noticeable fishy smell is present, that shifts the picture toward bacterial vaginosis (BV) or another cause. Itching is usually the dominant symptom 1Ref 1American College of Obstetricians and Gynecologists (2020).Vaginitis in Nonpregnant Patients: ACOG Practice Bulletin, Number 215.Clinical features, diagnosis, and OTC treatment criteria for vaginal yeast infection; differential diagnosis including BV and trichomoniasis; self-diagnosis accuracy.

Yeast infections are very common — most people with a vagina will have at least one during their lifetime. They occur when Candida, a fungus naturally present in small amounts in the vagina, overgrows. Antibiotics, hormonal changes, high blood sugar, and a weakened immune system are the most common triggers 1Ref 1American College of Obstetricians and Gynecologists (2020).Vaginitis in Nonpregnant Patients: ACOG Practice Bulletin, Number 215.Clinical features, diagnosis, and OTC treatment criteria for vaginal yeast infection; differential diagnosis including BV and trichomoniasis; self-diagnosis accuracy.

How does a yeast infection differ from BV or an STI?

Several conditions share overlapping symptoms, which is why self-diagnosis is unreliable:

BV is the most frequent vaginal condition and is commonly mistaken for a yeast infection 2Ref 2Workowski KA, Bachmann LH, Chan PA, Johnston CM, Muzny CA, Park I, Reno H, Zenilman JM, Bolan GA (2021).Sexually Transmitted Infections Treatment Guidelines, 2021.BV as the most frequent vaginal condition; differential diagnosis with yeast infection; treatment of BV and trichomoniasis. Trichomoniasis and other STIs require different treatments entirely. Studies consistently show that people self-diagnosing yeast infections are wrong a meaningful proportion of the time — the actual cause is often BV or another condition 1Ref 1American College of Obstetricians and Gynecologists (2020).Vaginitis in Nonpregnant Patients: ACOG Practice Bulletin, Number 215.Clinical features, diagnosis, and OTC treatment criteria for vaginal yeast infection; differential diagnosis including BV and trichomoniasis; self-diagnosis accuracy.

Lichen sclerosus, a less common vulvar skin condition, can produce recurrent symptoms that never fully resolve with antifungal treatment — worth mentioning to a clinician if yeast infections keep recurring.

When is OTC antifungal treatment appropriate?

Over-the-counter azole antifungal creams and suppositories are effective for uncomplicated yeast infections. They are appropriate when:

• You have had a clinician-confirmed yeast infection before and your current symptoms match exactly
• Symptoms are mild to moderate
• You are not pregnant
• You are not immunocompromised

One-day, three-day, and seven-day options are available; longer courses tend to work better for more significant symptoms. Oral antifungal tablets require a prescription. If OTC treatment does not resolve symptoms, do not simply repeat the course — get evaluated. Recurrent infections (four or more per year) are a separate clinical entity that benefits from a specific management plan 1Ref 1American College of Obstetricians and Gynecologists (2020).Vaginitis in Nonpregnant Patients: ACOG Practice Bulletin, Number 215.Clinical features, diagnosis, and OTC treatment criteria for vaginal yeast infection; differential diagnosis including BV and trichomoniasis; self-diagnosis accuracy.

What triggers a yeast infection?

The vaginal environment normally contains beneficial bacteria, primarily Lactobacillus species, that limit Candida growth. When this balance shifts, overgrowth can occur. Common associations include:

• Antibiotics: disrupt protective bacteria, one of the most frequent triggers
• Hormonal changes: pregnancy, the week before a period, or starting hormonal contraception
• High blood sugar or undiagnosed diabetes: recurrent yeast infections can be an early sign 3Ref 3US Preventive Services Task Force (2021).Screening for Prediabetes and Type 2 Diabetes: US Preventive Services Task Force Recommendation Statement.Basis for noting recurrent yeast infections as a possible indicator of undiagnosed diabetes warranting glucose screening
• Immunosuppression: HIV, chemotherapy, or long-term corticosteroid use makes infections more complicated

Yeast infections are not caused by poor hygiene and are not classified as a sexually transmitted infection, though sexual activity can occasionally trigger one.

When should you see a clinician?

See a clinician if:

• This is your first episode
• Symptoms are severe or rapidly worsening
• OTC treatment has not fully resolved things
• Discharge has an odor or unusual color
• You are pregnant
• You are immunocompromised
• You have had four or more infections in a year

A brief exam plus a vaginal pH test or wet-mount microscopy can identify the actual cause quickly. A yeast infection shows normal vaginal pH; elevated pH points toward BV or trichomoniasis 1Ref 1American College of Obstetricians and Gynecologists (2020).Vaginitis in Nonpregnant Patients: ACOG Practice Bulletin, Number 215.Clinical features, diagnosis, and OTC treatment criteria for vaginal yeast infection; differential diagnosis including BV and trichomoniasis; self-diagnosis accuracy. When infections recur or treatment keeps failing, a vaginal culture can identify the specific Candida species, since some strains are naturally resistant to common OTC antifungals [1, 2].