13-year-old female belongs to puberty, 13-year-old female labia big consider genetic factors, cysts, infections and other possibilities, the size of the labia is not a strict standard, mainly by observing the feeling of the size of the normal inaccurate, some people because of genetic factors, the labia is larger, as long as there is no obvious pain, redness, swelling, itching that is the normal phenomenon. If compared to the previous obvious increase, need to observe the girl labia whether red, swollen and pain, especially if appropriate pressure pain, consider cysts or the possibility of infection. At this time, you need to understand the severity of the infection through routine examination of the leukorrhea, through the use of antibiotics to treat, and at the same time you need to check whether there is vaginal itching or odor at the same time. If there is inflammation of the vagina, the labia may be irritated, and it is important to check if there is any external impact or trauma to the labia.