11-year-old girls have yellow discharge from their underwear, mainly inflammation or normal discharge in two cases, as follows: First, when there is vulvovaginal inflammation or urinary system inflammation, there will be yellow discharge from the vulva. This situation needs to be clarified whether the girl has vulvar itching, odor, and whether there are symptoms of urinary tract infection such as urinary frequency, urinary urgency, urinary pain, etc., to clarify whether it is caused by urinary tract infection or vulvar inflammation, so that further treatment can be given. Second, due to increased vulvar secretions, girls can have vulvar secretions when they reach the age of 11 years if they have early sexual development. In the early stages of individual cases, vulvar secretions can show yellow secretions, especially when the vulva has secretions, clear-colored secretions mixed with urine, often forming yellow secretions. The specific clarification of whether it is inflammation or normal secretion needs to be analyzed based on the actual physical examination, combined with the combination of symptoms.