If there is swelling in the vulva, it is commonly caused by the following clinical reasons: 1. caused by vestibular gland cysts, due to the inflammation of the vestibular gland, the gland ducts are blocked, resulting in the formation of local cysts, which do not cause local pain clinically and are often found unintentionally. The swelling of the vulva may also be caused by local allergic reactions, such as allergy to sanitary napkins, allergy to certain drugs, or allergy to newly worn underwear, which not only results in local swelling, but also in significant itching and local redness. It is advisable to go to the hospital for examination and then give treatment.