Most often, yeasts infection the vagina as well as the outer male genitals. They also tend to occur in the mouth and is later referred to as trash. Male genitals could be infected, however, usually with less symptoms. It is also possible to have an Metrogyl 400 mg causing over-growth of yeast throughout the stomach, the skin and around the nose. Children of all ages are often affected within the area of their diapers which is often known as diaper rash. Diaper rash could result from irritation caused by stool or urine, allergies to food, to wash media, or due to an amalgamation of different factors.