If every menstrual period is 2 days early, it is normal and can be treated without treatment, because if the menstrual cycle is >25 days, or on the basis of the original menstrual cycle, it is normal to be 3 days early or 3 days late, because in daily life, there may be changes in the menstrual cycle due to changes in the environment or dietary changes, which leads to changes in the menstrual cycle, and it is not in the absolute fixed time to come to menstruation is normal, and 2 days early is normal. It is not normal for menstruation to occur at a fixed time, but it is normal for menstruation to occur 2 days early. If the amount of menstruation also changes, then it is an abnormal phenomenon. It is recommended to take a sex hormone six test to find out whether endocrine abnormality is the cause of menstrual abnormality, and ultrasound examination is also recommended to rule out whether menstrual changes are caused by tumors in the genitals.