48 years old menstruation finished fifteen days and came back to consider menopausal menstrual disorders, ovulation bleeding, luteal insufficiency, endometrial local abnormalities and so on. 1. Menopausal disorders: most women at the age of 48 have entered menopause, with ovarian function declining and hormone levels fluctuating, so menstruation will be disrupted. 2. Ovulation bleeding: some women will shed a small amount of endometrium during ovulation due to the transient decrease of hormone level in the body, which can’t support the growth of endometrium, and the amount of bleeding is usually smaller than the amount of menstruation, so some people will think that it’s menstruation. 3. Luteal insufficiency: If there is a lack of follicle stimulating hormone during the follicular phase, follicle development will be slow and estrogen secretion will be reduced. In addition, the transition period of menopause will also lead to luteal insufficiency, and frequent menstruation will occur. 4. Localized endometrial abnormalities: localized endometrial abnormalities such as uterine fibroids or endometrial polyps can lead to abnormalities in the regulation of the coagulation fibre mechanism, which can also cause frequent menstruation. The 48-year-old menstruation after fifteen days and again can not be based on the symptoms of direct diagnosis, you should go to the hospital in time to do a detailed examination, clear cause of the disease, for the treatment.