Adolescent girls have not yet established a regular menstrual cycle, and whether it occurs earlier or later, it is considered normal. This is because the regulation of the menstrual cycle is very complex, involving the interdependence and mutual restraint of the hypothalamus, pituitary gland, and ovaries. Additionally, it is also influenced by the cerebral cortex, external environment, psychological factors, and bodily fluids. During adolescence, girls have not yet adjusted these aspects, so a normal menstrual cycle is not established. Menstrual irregularities at this stage are normal, and as long as there are no organic lesions, it generally does not pose a problem. If family members are concerned, a systematic examination at the hospital can be conducted. They may also visit the Traditional Chinese Medicine (TCM) department at a hospital for pulse diagnosis by a TCM practitioner to see if conditioning is needed, but it is best to follow the doctor's advice specifically.