If a bag grows next to the vagina, it is related to the following diseases: first, cysts of the vagina, often without clinical symptoms and do not cause pain, often found when unintentionally cleaning the vulva, it is recommended to give surgical treatment. Second, due to the obstruction of the vestibular gland ducts, the vestibular gland fluid can not be discharged, over time, it is easy to form a cystic mass, which does not cause pain if it is not combined with an infection. However, once infected, it will cause severe pain, and in serious cases, pus may appear, it is recommended to incise and drain, and at the same time, give a lot of anti-inflammatory drugs treatment.