The 40-year-old menstrual period is considered to be small and black with cold, endocrine disorders, etc., the treatment should be based on the cause of its compliance with the doctor’s instructions to use estrogen and progesterone preparations, kuntai capsules and other medications. 1. Cold; if a woman catches a cold before the onset of menstruation, it may lead to poor menstrual blood flow, resulting in low menstrual flow, black, or combined with abdominal pain and other discomforts, at this time, you can use hot water bags, warm stickers, etc. to warm the abdomen. 2. Endocrine disorders: for 40-year-old women, due to its genetic, environmental changes and other factors of stimulation, may lead to premature decline in ovarian function, which in turn affects the normal growth of follicles and discharge, the body lacks estrogen and progesterone, the menstrual flow of black, at this time you can follow the doctor’s instructions to use estrogen and progesterone preparations or oral Kuntai capsule and other medications. For 40-year-old women with low and dark menstrual flow, it is recommended that they go to the gynecology department of a regular hospital to improve ultrasound, sex hormones and other relevant examinations, and to clarify the cause of the disease under the guidance of the doctor to actively treat.