Chlamydia and gonorrhea are very common sexually transmitted diseases(STDs) that are caused by bacteria. Both are passed by infected semen, vaginal fluids or rectal discharge during vagina, orals or anal sex. Yeast infection on the other hand is actually caused by tight jeans. But if the itch keeps getting itchier, even when your jeans have been off for awhile, then there's something else involved.That something else could very well be a fungus whose technical name is Candida, and which causes what is often called a "yeast" infection. Such infections are most common in teenage girls and women aged 16 to 35, although they can occur in girls as young as 10 or 11 and in older women (and less often, in men and boys as well). You do not have to be sexually active to get a yeast infection.
