Vulvodynia is a condition that is characterized by chronic pain near the opening of the vulva (also known as the vagina). There is no known cause for vulvodynia. Women who experience vulvodynia often have symptoms such as burning and pain that may be severe enough to make it difficult to have sexual intercourse or even sit in a chair. Vulvodynia can last for months or even years. There are about six million women in the United States have vulvodynia. Vulvodynia may also be known as vulvar pain syndrome, vestibulitis, vestibulodynia, or clitoridynia.