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Medically Reviewed By Dr. Amanda Olson,DPT, PRPC
When something about your vagina feels off--itchy, painful, or uncomfortable--it can cause serious disruptions in your life. It can make urinating, sitting, exercising, or sexual activity difficult or impossible.
But there are many different root causes of vaginal changes, and it’s important to know the differences to know what treatment to expect. Here, we’ll review two of the most common vaginal disorders--bacterial vaginosis and yeast infections--and talk about how they differ from other vaginal disorders.
Bacterial vaginosis and yeast infections are both part of a broader category of vaginal disorders: vaginitis. Vaginitis describes a number of disorders which cause inflammation or irritation of either the vagina or the vulva.
This group includes the sexually transmitted infections trichomoniasis (“trich”), chlamydia, genital herpes, and gonorrhea; however, bacterial vaginosis and yeast infections are not considered STIs (Cleveland Clinic, 2018).
Note: The group of disorders collectively known as vaginitisis not the same as vaginismus, a disorder that causes extreme pain when inserting anything into the vagina (such as a tampon, penis, or sex toy).
Vaginismus does not usually come with other changes like pain or abnormal discharge. It can usually be treated with psychotherapy, vaginal dilators, or both (Lahaie et al, 2010; ter Kuile et al, 2013).
Bacterial vaginosis (BV) is an infection of the vagina that occurs when the usual bacteria present in the vagina are replaced with other species of bacteria. It’s important to note that a urinary tract infection (UTI) is not the same as bacterial vaginosis, as this is an infection of the urethra and not the vagina.
BV is very common. One study tested 3,739 women 14-49 years of age and found that 29.2% had BV at the time the test was taken. Of those, 84% did not report having any symptoms (Koumans et al, 2007).
The most reported symptom is a “fishy” smell to the vaginal discharge, which may become more noticeable after sex or while menstruating (Livengood, 2009). This discharge is sometimes described as thin and milky (Cleveland Clinic).
There are several risk factors that increase your chance of developing BV, but keep in mind that it is possible to have none of these risk factors and still develop BV:
While BV is not sexually transmitted, using a condom or an oral contraceptive may decrease the risk of infection (Livengood, 2009).
Like BV, yeast infections are caused by a change in the normal bacteria present in the vagina--particularly the presence of a bacteria called candida albicans(although other forms of the candidabacteria, and other bacteria altogether, can also cause yeast infections).
These infections are usually marked by itching, redness, and swelling of the vagina, as well as pain or burning of the vagina or while urinating. Yeast infections are also commonly indicated by thick, clumpy discharge, sometimes compared to cottage cheese (Spence & Melville, 2007).
Up to 75% of all people with vaginas will have a yeast infection sometime during their lives (Sobel, 1997), and about 3-4% will have chronic yeast infections characterized by 3-4 occurrences in one year (Denning et al, 2018).
Yeast infections are more common with hormonal changes such as pregnancy (Pawlaczyk et al, 2006) and post-menopausal people undergoing hormone replacement therapy (Fischer & Bradford, 2011), and might be more common in those taking oral contraceptives, though more research is needed (Donders et al, 2011).
Both bacterial vaginosis and yeast infections come with a host of symptoms that overlap with each other and with other infections. Here are some symptoms to watch out for, and what they may mean.
There are many causes of vaginal itching, and some--such as irritants, eczema, psoriasis, and even stress--have nothing to do with vaginal infections. However, vaginal itching is a symptom of many different disorders including bacterial vaginosis, yeast infections, and most STIs.
Pain while urinating, especially a burning sensation, is most associated with a UTI--however, this symptom can also be present in bacterial vaginosis, yeast infections, and trichomoniasis.
Keep in mind that some amount of vaginal discharge is normal, and that the consistency of vaginal discharge can change throughout each month, becoming thicker, thinner, “stickier”, or more prevalent. That said:
Yeast infections can cause the vagina to appear red and swollen. If there are lesions or bumps on the vagina, you might have genital herpes or HPV (however, bumps on your vagina can also just be pimples or ingrown hairs). Bacterial vaginosis usually does not come with any visual changes to the vagina.
Any time you sense something “off” about your vagina--pain (whether constant or during urination or intercourse), itching, discomfort, odor, visual changes to the vagina or vulva, or an abnormal change in your discharge, see a doctor; the medications they will recommend to treat each disorder will vary.
Keep in mind that it is possible to have both bacterial vaginosis and a yeast infection at the same time, which would give you a mix of symptoms. In rare cases, you can also have BV, a yeast infection, and a UTI concurrently, which all require different treatment.
You can mitigate the risk of contracting many of these disorders by practicing safe sex (oral contraceptives, condoms, or both) and good bathroom hygiene. It’s also important to check in with your OBGYN regularly to have tests run and to discuss any concerns you may have about your vaginal health.