The first thing that needs to be clarified is the cause of the two periods in January before menopause, and whether the cause of the rebleeding is frequent menstruation or abnormal bleeding due to other reasons. This situation is usually a manifestation of menopausal syndrome, but may also be other conditions, usually abnormal, it is recommended to promptly pay attention. 1. During menopause, the most obvious changes in the body of women are the decline of ovarian function, and at the same time the fluctuation of hormone levels in the body will be relatively large, which may lead to menstrual disorders and hormone level imbalance, resulting in the occurrence of menstruation twice in a month, which is a common abnormality in the perimenopausal period. 2. Other cases: The above cases may also be caused by diseases, such as precancerous cervical lesions, cervical cancer or endometrial lesions. It is recommended that women should pay attention to the symptoms of menstruation twice a month, go to the hospital for a detailed physical examination, make judgment according to the results and the doctor’s instruction, and standardize the treatment if necessary to avoid delaying the condition.