The black menstrual period and the small amount of causes: 1, some women’s physique is originally cold, before the menstrual period if the body is cold or eat cool fruit and food caused by stagnant blood stasis, it is easy to appear symptoms. 2, the normal life is too stressful, too tired, highly nervous and other reasons caused by endocrine disorders or ovarian dysfunction. 3, is the gynecological disease caused by organic disease, should go to the hospital to find a gynecologist detailed examination, the right treatment. 4, some women recovered after giving birth for a period of time before menstruation, so the recovery of menstruation after giving birth will have changes, pay attention to conditioning slowly will be good. Pay attention to personal hygiene, do not work too hard, relaxed mood, cold body can eat more calorie food, body attention to keep warm.