If an 11-year-old girl does not have her period yet, she needs to know the nature and color of the discharge from her underwear and whether there are corresponding clinical symptoms, such as itching and localized redness of the vulva, before she can analyze whether it is a physiological or pathological phenomenon. If the discharge is milky white, the amount is relatively small, and there is no odor or only a faint fishy smell, this is normal. If the discharge is yellowish in color, accompanied by vulvar itching and odor, this is an abnormal phenomenon and is probably caused by vaginal inflammation or vulvar inflammation. It is recommended to keep the area clean and wash the vulva with cleanser or take a sitz bath, and the symptoms will often disappear. If the symptoms still do not disappear, it is recommended to go to the hospital to check the white belt routine, according to the results before using medication.