TThe glands produce a fluid that helps protect the tissues around the
vagina and provides lubrication during sexual
intercourse. A cyst may develop when the duct of one of the glands becomes swollen and blocked and in cases where there is injury, irritation, or infection that may cause a buildup of fluid and swelling that blocks the duct It presents with swelling, tenderness, pain or discomfort during sexual intercourse and swollen, red and irritated labia.