This is what we found on Wikipedia regarding the Vulvodynia:

Vulvodynia is a chronic pain condition that affects the vulvar area and occurs without an identifiable cause. Symptoms typically include a feeling of burning or irritation. It has been established by the ISSVD that for the diagnosis to be made symptoms must last at least three months.

The causes of vulvodynia are not fully understood, but there are many sub-types of vulvodynia with different causes, including an excess of nerve fibers, hormonal imbalances, inflammation, and muscular dysfunction. Some factors influencing the disease may include genetics, immunology, and possibly diet. Diagnosis is by ruling out other possible causes. This may or may not include a biopsy of the area.

Treatment may involve a number of different measures; however, as vulvodynia has many sub-types, none is universally effective, and the evidence to support their effectiveness is often poor. Some of these measures include medications, pelvic floor physical therapy, surgery, and counselling. Vulvodynia is estimated to affect up to 10-28% of women.