Low menstrual flow and dark color may be caused by cold stimulation, premature ovarian failure, polycystic ovary syndrome, etc., which can be relieved by paying attention to warmth, adjusting diet and medication such as ethinyl estradiol cyproterone. 1. Cold stimulation: If the body is stimulated by cold, it may affect the normal discharge of menstrual blood, resulting in low menstrual flow and dark color, at this time, pay attention to keep warm, avoid contact with cold objects and food. 2. Premature failure of ovarian function: at this time, it is necessary to use estrogen and progesterone drugs, such as estradiol, estriol, dydrogesterone and so on, to improve the situation of low menstrual flow and dark color. 3. Polycystic ovary syndrome: at this time, we need to adjust the menstrual cycle, promote the smooth shedding of the uterine lining, the use of dydrogesterone, ethinyl estradiol cyproterone and other drugs. If the situation of low menstrual flow and dark color persists and cannot be relieved, it is recommended to go to the hospital in time for examination to clarify the cause and carry out scientific treatment under the guidance of the doctor. All of the above medications should be used under the guidance of a doctor, avoid self-medication.