Vestibular cysts are caused by the blockage of the vestibular ducts, which leads to the collection of secretions. It is hard to say how many days a vestibular cyst, will turn into pus, it is about 5 to 6 days time, because everyone is different. If the cyst is small and not infected, the thick fluid will be absorbed on its own, so treatment is usually not needed. However, if the cyst is large and accompanied by vulvar swelling and discomfort during sexual intercourse, surgical treatment is needed, and the common surgery is ostomy. It is generally recommended not to eat spicy and stimulating food for 1 month after surgery to avoid affecting the recovery of the wound.