Menstruation is an iconic physiological phenomenon of women, and its normalcy is closely related to women’s physical and mental health. Irregular menstruation is a common gynecological disease, which not only indicates gynecological problems, but also affects the function of other organs of the body over time, and even triggers psychological abnormalities. Here we discuss the knowledge of irregular menstruation from both Western medicine and Chinese medicine perspectives. What should be a normal menstruation? Generally speaking, menstruation occurs about every 28 days, lasts for 3-7 days, and the bleeding volume is within 100ml, with the 2nd and 3rd days being the most frequent. Menstrual blood is usually dark red in color, non-clotting (i.e., no clots), and contains endometrial debris, cervical mucus and vaginal epithelial cells in addition to blood. Then, what are the clinical manifestations of irregular menstruation? 1, the menstrual cycle is irregular, early or delayed, appearing too short cycle or prolonged period. Generally, more than one week in advance or delayed is regarded as morbid. 2.Variable menstrual flow, too much, too little or amenorrhea. 3.Accompanying abdominal pain before and during menstruation and generalized symptoms. Common ones are as follows: 1. Dysmenorrhea, combined with severe pain in the lower abdomen during menstruation. 2.Premenstrual syndrome, such as nervousness, emotional instability, poor concentration, irritability, depression, insomnia, headache, breast swelling and pain. Mostly due to sex hormone metabolism dysregulation and mental factors. 3.Polycystic ovary syndrome, manifested as scanty menstruation or amenorrhea, infertility, hirsuteness and obesity, etc. Both ovaries are enlarged in polycystic nature, and some patients are accompanied by diabetes mellitus. 4, menopausal syndrome, some women before and after menopause appear a series of symptoms of plant nervous disorders, such as insomnia, irritability, panic, hypogonadism, paroxysmal sweating. After talking about the common clinical manifestations of irregular menstruation, we will talk about the causes of irregular menstruation. Hormonal imbalance is the most common cause of uterine bleeding, especially in young girls and menopausal women, because of hormonal imbalance caused by anovulatory bleeding, which causes the first menstruation or soon to stop menstruation, menstruation presents a chaotic situation. In addition, adenomyosis and endometriosis often lead to heavy menstrual flow, accompanied by severe dysmenorrhea. 2.Emotional abnormalities Long-term mental depression, stress, sulking or suffering from major mental stimulation and psychological trauma can lead to menstrual disorders or dysmenorrhea, amenorrhea. 3.Irrational diet structure Irrational diet structure, excessive dieting, resulting in a large amount of fat and protein in the body is depleted, resulting in estrogen synthesis disorders, inhibit the hypothalamus function, thus affecting the menstrual flow, or even scanty menstrual flow or amenorrhea. 4, bad habits of life love of beauty, modern women are more so. Many female friends in order to dress beautiful, often still wear stockings in the winter, can be called “beautiful freezing”, however, the prolonged cold stimulation, so that the pelvic blood vessel contraction, can often cause ovarian dysfunction. In addition, women who are addicted to tobacco and alcohol are more likely to experience symptoms of irregular menstruation. In addition to the above common causes, irregular menstruation can also be caused by blood clotting difficulties, thyroid problems, poor liver function and some gynecological diseases. Finally, what are the daily precautions for irregular menstruation? 1, pay attention to hygiene, wash and change underwear, avoid sexual intercourse during menstruation, and it is recommended to pay attention to cleanliness after sexual intercourse. 2, should pay attention to keep warm, avoid cold stimulation, eat less cold and hard food, especially during menstruation. Avoid staying up late, and eat less stimulating food such as sour and spicy food. 4, the diet needs to be diversified, not in order to lose weight and believe in vegetarianism, lean meat, fish should be appropriate to eat, it is recommended to eat cereals, dark green leafy vegetables and calcium-rich foods.