2. Excessive yeast infections
When there is an overgrowth of a specific type of yeast, known as Candida albicans, a yeast infection in either the vagina, the mouth (thrush), or both, can occur. When glucose levels are high in the blood, the conditions are highly favorable for the growth of yeast, which can increase the risk of both vaginal and oral yeast infections.
With vaginal yeast infections, symptoms include a burning sensation, intense itching, soreness, pain during intercourse and vaginal discharge that can be oddly colored or foul smelling. With oral infections, a coating that resembles cottage cheese covers the tongue.