The back pain, mood deterioration, feeling to come late, delayed 5 days worried, in fact, this is not the great aunt delay, only more than 7 days delay is also considered great aunt delay, resulting in great aunt delay generally have these 5 reasons. 1. Pregnancy The sisters who have a sexual life must pay attention! If your period is delayed for more than 10 days, it is likely to be a “little surprise”. It is recommended to use a pregnancy test or a pregnancy test first, and then consider other situations. 2. Endocrine disorders ① Too fat, too thin After the age of 18, the distribution of body fat should reach at least 22% of body weight in order to maintain a normal menstrual cycle. Obese people are more likely to have delayed menstruation, and the incidence of abnormal menstrual cycle findings is higher when BMI>24kg/m2. Excessive dieting and strenuous exercise can lead to malnutrition and low weight, a condition in which the synthesis of estrogen in the body becomes impaired, thus affecting the arrival of the period and also leading to a prolonged period. ②Sleep problems Low sleep quality, staying up late, and irregular sleeping hours can lead to endocrine disorders, abnormal hormone secretion in the body, and disruption of the menstrual cycle. ③High mental stress Being in a state of mental tension and stress for a long time will affect the normal function of the hypothalamus, which will lead to delayed menstruation. ④Other endocrine-related diseases If delayed menstruation or even amenorrhea is accompanied by obesity, hirsutism, acne and infertility, it may be polycystic ovary syndrome. The thyroid gland is a gland that produces hormones and regulates metabolism. Hypothyroidism can be manifested by delayed menstruation, indifferent expression, sluggishness, and memory loss. With thyroid disorders such as Hashimoto’s disease, hormonal imbalances may affect the menstrual cycle. High prolactin can also cause irregular menstruation, etc. In addition, premature ovarian failure may also lead to delayed menstruation if you are over 40 years old. Drugs The basis of menstruation is the withdrawal of estrogen and progesterone. If hormones are used inappropriately, they can affect the menstrual cycle, most commonly progesterone, emergency contraceptives and other drugs containing progesterone, which can cause prolonged luteal phase and thus delayed menstruation. 4. Surgery Uterine cavity and cervical adhesions caused by cervical surgery, especially after painless abortion. Chronic diseases such as anemia, chronic hepatitis and tumor can also cause delayed menstruation. All women must correctly understand and treat the problem of menstrual disorders, and lift the tension, anxiety and anxiety. If there is a delay once in a while, do not be anxious yet, you can adjust your mood and diet and wait. Severe menstrual disorders must go to the hospital and undergo routine gynecological treatment. Raise awareness of physiological health, especially proper health care and care during menstruation. References: [1] Fan Min,Cai Taisheng. Analysis of the correlation between menstrual status and mental health of female college students[J]. Chinese Journal of Health Psychology,2009.17(12):1471 [2] Cao Zeyi. Chinese obstetrics and gynecology [M]. Beijing: People’s Health Publishing House, 1999