It is an abnormal phenomenon to advance the period by 10 days, which belongs to one kind of menstrual irregularity, and is considered to be related to mental factors, drug factors and disease factors. 1. Psychological factors: for the recent excessive mental tension, anxiety, can be due to endocrine disorders, ovarian function abnormalities and the phenomenon of menstruation 10 days early. 2. Drug factors: some women’s period 10 days early is mainly due to the use of contraceptive pills to affect the hormone level. 3. Disease factors: mainly divided into gynecological diseases and other diseases. Gynecological diseases mainly include premature ovarian failure, uterine fibroids, endometriosis, adenomyosis, polycystic ovary syndrome and so on. As for other diseases, they mainly include chronic hepatitis, hyperthyroidism or hypothyroidism. In addition, strenuous exercise, prolonged late night, improper diet, etc. can also cause some women to have their periods 10 days earlier. For those who used to have menstruation on time but now have 10 days early menstruation, they should consult a doctor in time for examination, so as to clarify the disease and follow the doctor’s instructions for treatment.