It is normal for your period to be 7 days early. The average woman’s menstrual cycle is 21 days-35 days, with an average of 28 days. The general cause of early menstruation is caused by endocrine disorders. It may be due to emotional influences such as stress, irritation or other things that can cause early onset of menstruation. Or it can be caused by exams, stressful work, living in a different place and so on, which can cause early onset of menstruation. If it is within 7 days, it can be left untreated and observed. If it is more than 7 days or more than 7 days, it is recommended to go to the hospital for examination in time. Ultrasound examination can be performed to understand the condition of uterine adnexa and endometrium, whether there are polycystic ovaries, the endometrium of the uterus, and hormone level examination can be performed to understand whether the hormone is caused by the abnormal menstruation due to the decline of ovarian function, so that timely treatment and adjustment can be given.