In the vast majority of girls, when they have their first menstrual period, their menstruation will be a little disorganized because the ovarian function is not yet particularly perfect. But after three months to half a year or so, menstruation will be normal. If the menstruation is still disturbed even after one year, it is recommended to go to the hospital to do the corresponding examination, and perform ultrasound to find out whether the uterus and adnexa are normal, especially to find out whether the uterus develops, whether its size is normal, whether there is a longitudinal septum in the uterus or whether there is a saddle-shaped uterus and so on, so as to exclude the possibility of developmental abnormality. It is recommended to take blood test for sex hormone six and thyroid function, which can understand the endocrine condition, and then according to the results of the corresponding regulation. It is also recommended that girls should not eat cold foods when they are menstruating.