It is not normal for a woman to have a bag at the vaginal opening. Most of them are related to inflammation caused by: i. It may be a boil and carbuncle infection or vaginal cyst caused by vulvar inflammation. Second, it may be caused by a vestibular gland cyst or abscess. It is best to go to the hospital for a checkup and examination. If it is caused by a boil and carbuncle infection, you need to give lotion for cleaning and apply erythromycin ointment locally for treatment. If vaginal cysts are caused by vaginal cysts, they need to be removed surgically as soon as possible. If vestibular gland cysts or abscesses occur, they should be cleaned with potassium permanganate solution at a ratio of 1:5000 and then treated with cystostomy or exenteration. Fourthly, most of the pouches at the vaginal opening in women are bacterial infections caused by local friction.