There are several terms for a yeast infection, Thrush, Candidiasis, Candida. They are all the same thing, caused by the multiplying of a fungus, Candida Albicans. Anyone can be affected, both genders and any age.
The genital area and in particular the vagina, is a perfect breeding ground for the fungus and that is why vaginal yeast infections are the most frequent type to occur. This means that though not limited to women, it is more usual for it to happen to a woman.
There are several causes or triggers that lead to the overgrowth, a few mentioned here are clothing, medication, pregnancy, improper drying after bathing, incorrect wiping after a bowel movement, not changing out of wet clothing, diabetes and diet.