Ovarian cysts in 13-year-old girls can usually be treated under the guidance of a doctor. Physiological cysts can be observed regularly, while pathological cysts require surgical treatment. 1. Regular observation: Ovarian cysts usually refer to cystic structures on the surface or inside the ovary. If they are physiological cysts, they do not require special intervention and are recommended to be observed regularly, usually after menstruation, and will usually disappear over time. 2. Surgical intervention: If a 13-year-old girl with ovarian cysts develops symptoms, such as pain and swelling in the lower abdomen, which have a greater impact on daily life, or if she is judged to be a pathologic cyst, she needs to under the guidance of the doctor to intervene by means of surgical resection to avoid serious problems. A 13-year-old girl with ovarian cysts should go to the hospital in time for treatment under the guidance of a doctor.