Generally speaking, menstrual disorders are not related to age, the main causes of menstrual disorders are: a. Irregular work and rest, due to the influence of life or work often stay up late, or work and rest time reversal this bad work and rest habits can easily lead to endocrine disorders caused by menstrual disorders. Second, excessive weight loss, uncontrolled weight loss or excessive exercise will lead to the body does not consume enough protein or fat, which affects the normal synthesis of estrogen in the body, resulting in low menstrual volume or amenorrhea and other symptoms of menstrual disorders. Emotional factors, if long-term depression, anxiety or great mental stress, hypothalamus function will be damaged, the ovaries can not secrete hormones, also can not ovulate, easily lead to menstrual disorders. Fourth, abortion surgery, multiple abortion surgery will lead to thin endometrium, uterine damage is difficult to repair, it will cause irregular periods. V. Uterine fibroids, women with fibroids usually have symptoms of irregular periods, mainly in the form of heavy menstrual flow and extra long periods. In addition, thyroid problems and the placement of birth control rings may cause irregular periods.