There are many factors affecting menstruation, such as tension, fatigue, stress, etc., which may cause a week early menstruation. When menstruation is early, the endometrial lining is thin before menstruation, which will show as a low volume of menstruation. Occasionally a week early menstruation does not need treatment, pay attention to regular life, keep emotional stability can generally return to normal on its own. If you have frequent early periods and low menstrual flow, you need to go to the hospital for examination, which may be caused by abnormal ovarian function, and ultrasound and blood test for sex hormone 6 on the 2nd to 5th day of menstruation. If you want to keep your period normal, you should pay attention to healthy diet, regular life, work and rest, and relaxation. Dieting and weight loss, weakness and bad mood may cause irregular periods.