The menstruation is 1 week early every month, there are two possibilities: 1, if the usual has been, this situation indicates that the menstrual cycle is relatively short, women’s menstrual cycle is only 23 days, but the female body’s endocrine is normal, there is little impact on the human body. 2, if the usual menstrual cycle is about 28 days to come once, the recent period found to be a week early, this situation should be suspected of the body luteal body The luteinizing body shrinks early, leading to early menstruation, you can take a blood test on the 22nd day of menstruation to check the level of progesterone in the body, if the progesterone is low, you can eat medication.