Aunt refers to menstruation. 45 years old menstruation a week early may be normal, at the same time need to pay attention to whether it is menstruation or abnormal bleeding. Generally speaking, after the age of 45, women gradually enter the perimenopausal period, at which time the function of the ovaries gradually declines and the follicles are close to depletion, which makes the secretion of estrogen and progesterone change dramatically, leading to irregularities in ovulation, which can be manifested in disorders of menstruation, i.e., the intervals between bleeding and the amount of bleeding can be different lengths, and therefore it is possible to experience menstruation one week early. In addition, it is necessary to pay attention to whether the bleeding is caused by menstruation or diseases, such as ovarian cancer, cervical cancer, endometrial cancer, endometrial polyps and other diseases. It is recommended that ultrasound, endometrial biopsy, cervical cytology, sex hormone test, etc. should be performed if necessary to clarify the condition. In conclusion, it is recommended to consult a doctor for standardized diagnosis and treatment when necessary.