Irregular menstruation in children may be related to poor dietary habits, imperfect ovarian function, endocrine disorders and other factors. It can be treated by improving bad dietary habits, observation and endocrine-regulating drugs. 1. Bad dietary habits: When there are bad habits such as staying up too late at night, eating cold and cold foods frequently, or having too much psychological pressure, it may lead to irregular menstruation in children. It can be regulated by eating less cold and spicy stimulating foods and avoiding overwork. 2. Imperfect ovarian function: children are in the developmental stage, the ovarian gonadal axis function is not fully developed, the menstrual cycle may be irregular within 5-7 years after menarche, irregular menstruation, if there are no other symptoms, usually no need for treatment. 3. Endocrine disorders: children with hyperthyroidism, hyperprolactinemia and other diseases can also lead to irregular menstruation, which can be treated with oral endocrine regulating drugs, such as propylthiouracil tablets, bromocriptine and so on. In the case of irregular menstruation in children, it is recommended to go to the hospital in a timely manner to identify the cause of the disease, and then follow the doctor’s instructions to use medication.