Eleven-month-old child vulva a little closed may be a normal phenomenon, may also be the labia minora adhesion, congenital vaginal atresia and other factors. 1. Normal phenomenon: eleven-month-old children are still relatively small, the labia are also relatively small, the appearance of a slight closure may be a normal phenomenon, with age, will gradually separate. 2. Labia minora adhesion: eleven-month-olds usually have lower hormone levels in their bodies. If the diaper is wrapped for too long, or if they don’t pay attention to local hygiene, inflammation of the vulva may occur, resulting in labia minora adhesion, leading to the phenomenon of vulvar closure. 3. Congenital vaginal atresia: it may be caused by congenital dysplasia, which is a kind of pubic deformity disease, and this condition may also lead to the symptom of vulvar closure in infants and children. The specific cause of vulvar atresia in eleven-month-olds cannot be observed accurately with the naked eye, so it is recommended to go to the hospital as soon as possible, undergo the relevant examinations, make a clear diagnosis, listen to the doctor’s advice, and get treatment as soon as possible, so as to avoid delaying the child’s condition, which will lead to undesirable consequences.