If you are 11 years old and have your menstrual period after 10 days, it is mainly due to dysfunctional uterine bleeding during puberty, but this condition also occurs due to intake of stimulating foods, lack of sleep, etc. Adolescent dysfunctional uterine bleeding is caused by the immature feedback mechanism between the hypothalamic-pituitary-ovarian axis, the defective feedback of the brain center to estrogen, and the low level of folliculopoietin, which leads to irregular and short intervals of menstruation. The diagnosis is usually confirmed by the history of irregular menstruation, ultrasound examination, sex hormone six test and basal body temperature test report results, and different treatments are needed according to its severity. If the bleeding volume is not too big and the hemoglobin volume is not much different from the normal value, it is recommended to strengthen physical exercise and pay attention to nutrition, and there is no need to give hormone treatment. If the menstrual volume is large and lasts for a long time, and the hemoglobin volume is lower than the normal value, but not lower than 100g/L, it is necessary to take drugs for treatment under the guidance of professional doctors, such as dydrogesterone, etc. If hemorrhagic shock occurs and the hemoglobin is lower than 100g/L If hemorrhagic shock occurs and hemoglobin is less than 100g/L, the patient should be hospitalized for emergency treatment and often treated with drugs such as estradiol benzoate. The intake of stimulating food, lack of sleep, mood swings and other factors can also have an impact on menstruation. It is recommended to diversify the diet, eat more vitamin-rich fruits and vegetables, such as kiwis, oranges, etc., avoid staying up late, ensure sleep, appropriate physical exercise, work and rest, in addition to diligent change of underwear, pants, to avoid infection.