At 9 and a half, what should be paid attention to when having menstruation?

Patient's question:

No

Doctor's answer:

If this situation occurs, it is considered relatively early. If symptoms appear before the age of nine, there may be developmental abnormalities and it falls within the range of precocious puberty. It is possible that the child has abnormal secretion of sex hormones. It is recommended that parents take the child to the hospital for examination.