28 Aug 2026 (Navroze Bureau) : Even mildly elevated blood sugar can be a reason to pay attention to metabolic health, particularly when fungal infections occur repeatedly. High blood glucose is associated with a greater risk of several fungal infections, especially in people with diabetes.
How Blood Sugar Is Linked to Fungal Infections
Fungi such as Candida normally live on the skin and inside the body without causing problems. However, certain health conditions can make it harder for the body to keep fungal growth under control.
Diabetes is a recognised risk factor for candidiasis, and the CDC notes that fungal infections are more likely when blood sugar levels are high.
Does ‘Mildly High’ Sugar Mean You Will Get an Infection?
Not necessarily.
Having a single blood-sugar reading that is slightly above the normal range does not automatically mean that a person will develop a fungal infection. Risk depends on factors including how high the glucose levels are, whether they remain elevated over time, immune health and the presence of other medical conditions.
Repeatedly elevated glucose deserves more attention than an isolated abnormal reading.
Why Diabetes Can Increase the Risk
When blood glucose remains high, the body’s ability to fight infections can be affected. In addition, high blood sugar can result in more glucose being released into urine, creating conditions that can encourage yeast and bacteria to grow.
This is one reason people with poorly controlled diabetes can be more prone to infections such as vaginal yeast infections and certain skin fungal infections.
Which Fungal Infections Are Common?
Fungal infections associated with diabetes can affect different parts of the body.
Common examples include:
- Vaginal candidiasis
- Oral thrush
- Athlete’s foot
- Jock itch
- Ringworm
- Other fungal infections affecting warm, moist areas of the skin
Repeated infections should not simply be treated as an isolated skin problem.
Recurring Infections May Need a Blood-Sugar Check
If someone repeatedly develops yeast or other fungal infections, it can be worth discussing glucose testing with a healthcare professional.
Depending on the circumstances, a clinician may recommend tests such as fasting blood glucose or HbA1c, which provides an estimate of average blood glucose over the previous several months.
An abnormal result does not by itself establish the cause of recurrent infections, but it can help identify previously unrecognised diabetes or impaired glucose regulation.
Lifestyle Can Make a Difference
Keeping blood glucose within a healthy range is an important part of reducing infection risk for people with diabetes. The CDC specifically recommends blood-sugar control as a way to help prevent fungal infections.