Vaginal yeast infection | |
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Other names | Candidal vulvovaginitis, vaginal thrush |
Gram stain showing the spores and pseudohyphae of Candida albicans surrounded by round vaginal skin cells, in a case of candidal vulvovaginitis. | |
Specialty | Gynaecology |
Symptoms | Vaginal itching, burning with urination, white and thick vaginal discharge, pain with sex, redness around the vagina[1] |
Causes | Excessive growth of Candida[1] |
Risk factors | Antibiotics, pregnancy, diabetes, HIV/AIDS[2] |
Diagnostic method | Testing the vaginal discharge[1] |
Differential diagnosis | Chlamydia, gonorrhea, bacterial vaginosis[3][1] |
Treatment | Antifungal medication[4] |
Frequency | 75% of women at some point[1] |
Vaginal yeast infection, also known as candidal vulvovaginitis and vaginal thrush, is excessive growth of yeast in the vagina that results in irritation.[5][1] The most common symptom is vaginal itching, which may be severe.[1] Other symptoms include burning with urination, a thick, white vaginal discharge that typically does not smell bad, pain during sex, and redness around the vagina.[1] Symptoms often worsen just before a woman's period.[2]
Vaginal yeast infections are due to excessive growth of Candida.[1] These yeast are normally present in the vagina in small numbers.[1] Vaginal yeast infections are typically caused by the yeast species Candida albicans. Candida albicans is a common fungus often harbored in the mouth, digestive tract, or vagina without causing adverse symptoms.[6] The causes of excessive Candida growth are not well understood,[7] but some predisposing factors have been identified.
It is not classified as a sexually transmitted infection; however, it may occur more often in those who are frequently sexually active.[1][2] Risk factors include taking antibiotics, pregnancy, diabetes, and HIV/AIDS.[2] Tight clothing, type of underwear, and personal hygiene do not appear to be factors.[2] Diagnosis is by testing a sample of vaginal discharge.[1] As symptoms are similar to that of the sexually transmitted infections, chlamydia and gonorrhea, testing may be recommended.[1]
Treatment is with an antifungal medication.[4] This may be either as a cream such as clotrimazole or with oral medications such as fluconazole.[4] Despite the lack of evidence, wearing cotton underwear and loose fitting clothing is often recommended as a preventive measure.[1][2] Avoiding douching and scented hygiene products is also recommended.[1] Probiotics have not been found to be useful for active infections.[8]
Around 75% of women have at least one vaginal yeast infection at some point in their lives, while nearly half have at least two.[1][9] Around 5% have more than three infections in a single year.[9] It is the second most common cause of vaginal inflammation after bacterial vaginosis.[3]