Vestibular gland cysts are caused by inflammatory infection of the blocked ducts of the vestibular gland. In the acute phase of a cyst attack, the cysts are hard because they contain a lot of purulent secretions and are particularly painful when touched. However, when the cyst is usually small and not attacked, it is still relatively soft, but a little painful to touch. The best treatment for this cyst is to have an incision and drainage of the cyst along with anti-inflammatory treatment.