If this is your first yeast infection, don't try to diagnose or treat it yourself. The only way to know for sure is to see your doctor. It might be another kind of vaginal condition, and more than one infection can occur at the same time. If you take oral antibiotics, or are on a regular course of antibiotic therapy, a yeast infection can result. Steroid therapy can also cause yeast overgrowth.
Yeast infections are also common in certain people with diabetes .
When the blood sugar is high, yeast can grow rapidly. Your lifestyle can make a difference, too. Wearing tight jeans, synthetic underwear, or a wet swimsuit can create a warm, moist environment where Candida thrives. Douching and wiping from rear to front after urination or a bowel movement can also negatively affect the vaginal environment. A compromised immune system can also result in yeast overgrowth.