Functional uterine bleeding, also known as dysfunctional uterine bleeding, or homeostasis for short, refers to abnormal uterine bleeding, but after diagnosis and examination, no organic lesions of the body and reproductive organs have been found, but it is due to the dysfunction of the neuroendocrine system, which is a kind of endocrine disease. Symptoms include irregular menstrual cycles, excessive menstrual flow, prolonged menstrual period or irregular bleeding. The main hazards are the following four points: 1, dysmenorrhea is easy to cause other inflammatory diseases: due to dysmenorrhea changed the normal weak acidic environment of the vagina, thus the self-purification function of the vagina was damaged, the invasion of pathogenic bacteria can not be killed, which leads to the infection of the vagina, inducing a variety of gynecological diseases, causing harm to the human body. 2, dysmenorrhea is also prone to cause infertility: dysmenorrhea a lot of long-term bleeding to women caused by a great deal of physical health, if not in time, for women who do not have children, or cause infertility. 3.Triggering anemia affects physical health. Patients often have symptoms of anemia, such as pale face, pale eyelids, claw nails, conscious weakness, dizziness, tinnitus and other symptoms. 4, dysmenorrhea can even be life-threatening: due to the frequency of dysmenorrhea, bleeding time is long and the amount of bleeding is large, patients often suffer from anemia due to blood loss, or even hemorrhagic shock and life-threatening.