When Lactobacillus levels are changed or lowered in some way, Candida can overgrow, causing an infection. You can also develop a Candida genital infection after certain sexual activities, especially those involving oral-genital contact.

How is candidiasis transmitted?

A man with a penile yeast infection can also transmit his infection to a female partner through sexual contact. An overgrowth of Candida in the mouth is also called thrush. Thrush can be contracted through oral sex with a person with a vaginal or penile yeast infection. Learn more about how thrush is spread.

What causes female candidiasis?

Candidiasis is an infection caused by a yeast (a type of fungus) called Candida. Candida normally lives inside the body (in places such as the mouth, throat, gut, and vagina) and on skin without causing any problems.