Yeast Infections and Diabetes: Why Blood Sugar Matters and What Helps

Written by Cherlie Joseph, MSN, FNP-BC · Medically reviewed by Naurah Gaspard, DNP, FNP-C, FNP-BC · Updated November 2026

People with diabetes get vaginal yeast infections more often because extra sugar in the body and urine helps Candida yeast grow, and high blood sugar weakens the immune response. Some diabetes medicines called SGLT2 inhibitors also raise the risk. Treatment may need to be longer than usual, and better blood sugar control is one of the best ways to prevent repeat infections.

Why diabetes raises yeast infection risk

Candida yeast lives on the skin and in the vagina in small amounts. Several things about diabetes tip the balance in its favor:

• More sugar for yeast to feed on. When blood sugar runs high, glucose levels rise in vaginal tissue and urine.
• A weaker immune response. High blood sugar makes it harder for white blood cells to fight infection.
• A slower response to treatment. The CDC notes that poorly controlled diabetes can make short-course treatment less effective.

Repeated yeast infections can even be an early clue to undiagnosed diabetes or prediabetes. If you are getting infections often and have not had your blood sugar checked recently, ask about an A1C test.

SGLT2 inhibitors and yeast infections

SGLT2 inhibitors lower blood sugar by making the kidneys release extra glucose into the urine. They include canagliflozin (Invokana), dapagliflozin (Farxiga), empagliflozin (Jardiance) and ertugliflozin (Steglatro), plus combination pills. They also protect the heart and kidneys, which is why they are used so widely.

The trade-off: sugar in the urine around the genital area makes yeast infections more likely. The FDA lists genital yeast infections as a common side effect of the whole class. Most are mild and treatable, and many people can keep taking their medicine.

Do not stop an SGLT2 inhibitor on your own. Talk to the provider who prescribed it. Good hygiene, staying dry and prompt treatment are often enough. GLP-1 medicines such as semaglutide work differently and do not put sugar in the urine.

Symptoms, and when it is more than yeast

Yeast infection symptoms are the same with or without diabetes: itching, burning, redness and swelling of the vulva, pain with sex or urination, and thick white discharge with little odor. Men with diabetes can get a similar yeast infection of the head of the penis (balanitis), with redness, itching and a white film.

Diabetes also raises the risk of urinary tract infections, and SGLT2 inhibitors carry an FDA warning about a rare but serious infection of the genital and perineal area called Fournier's gangrene. Pain, tenderness, redness or swelling of the genitals or the area between the genitals and rectum, especially with fever or feeling very unwell, needs same-day in-person care.

How treatment differs with diabetes

With well-controlled diabetes, a mild yeast infection is usually treated the same way as anyone else's: an over-the-counter vaginal antifungal or a single prescription fluconazole tablet. With poorly controlled diabetes or more severe symptoms, the CDC guidelines treat it as a complicated infection:

Situation	What usually changes
Blood sugar not well controlled	Longer course, often 7 to 14 days of treatment
Severe redness, swelling or cracking	Longer vaginal treatment or a second fluconazole dose 3 days later
Three or more infections a year	Culture or PCR test, then a 6-month maintenance plan
Non-albicans yeast found on testing	A non-fluconazole medicine, since these species often resist it

If you take a sulfonylurea such as glipizide or glimepiride, tell your provider before taking fluconazole, because the combination can cause low blood sugar.

How to prevent repeat infections

• Work toward your blood sugar goal. The American Diabetes Association suggests an A1C below 7% for many adults, though your target may differ.
• If you take an SGLT2 inhibitor, gently rinse and dry the genital area daily, and stay well hydrated as your provider advises.
• Keep the area dry. Wear breathable cotton underwear and change out of sweaty or wet clothing promptly, which matters in Florida heat.
• Skip douches and scented products, which disturb protective bacteria.
• Treat early and follow up if symptoms return within two months.

Frequently asked questions

Can a yeast infection be a sign of diabetes?

Yes, frequent or hard-to-treat yeast infections can be an early sign of diabetes or prediabetes. A simple A1C blood test can check.

Does Jardiance or Farxiga cause yeast infections?

Genital yeast infections are a known, common side effect of SGLT2 inhibitors like Jardiance and Farxiga. Most are mild and treatable. Talk to your prescriber before stopping the medicine.

Is fluconazole safe if I have diabetes?

Usually, but fluconazole can raise levels of some diabetes pills, especially sulfonylureas, which may cause low blood sugar. Your provider will review your medications first.

Sources

• CDC: Vulvovaginal Candidiasis, STI Treatment Guidelines
• FDA: Safety announcement on SGLT2 inhibitors
• MedlinePlus: Vaginal yeast infection

Keep reading

• A1C test explained
• Recurrent yeast infections: why they keep coming back
• Fluconazole (Diflucan) guide
• Browse all conditions and treatments A to Z

This article is for general education and is not a substitute for medical advice. Treatment, including any prescription, is decided by a licensed provider after reviewing your health history. OurTopClinic is not for emergencies; if you have a medical emergency, call 911. OurTopClinic serves adults located in Florida, New Mexico, Oregon and Washington. Learn more at ourtopclinic.com.