Most uterine thickening refers to thickening of the endometrium, which may be caused by adenomyosis, endometrial hyperplasia, polycystic ovary syndrome, hormonal abnormalities, etc. It may also be a thickening of the uterine wall, generally related to fibroids, uterine body inflammation and other causes, and the cause of uterine thickening needs to be determined according to the specific symptoms and the location of the thickening. 1, adenomyosis: adenomyosis is mainly caused by the invasion of the endometrium into the myometrium, which may cause thickening of the endometrium, thus easily causing heavy menstrual bleeding, prolonged periods, dysmenorrhea and other phenomena. If the menstruation has been unclean, you can take some hemostatic drugs under the guidance of a doctor, and if necessary, you need to scrape the uterus for treatment to avoid causing anemia; 2. Endometrial hyperplasia: due to hormonal action on the patient, simple endometrial hyperplasia, complex endometrial hyperplasia, and endometrial hyperplasia in the proliferative phase can occur, resulting in thickening of the endometrium, which usually results in heavy menstruation and prolonged periods, and also It can easily lead to diseases such as endometrial adenoma-like hyperplasia, therefore, it is necessary to go to the hospital for diagnostic scraping treatment as early as possible; 3. Hormonal secretion abnormalities: endometrium can produce different degrees of hyperplasia and thickening when it is subjected to the continuous action of estrogen, while there is no antagonism of progesterone. For example, polycystic ovary syndrome will lack progesterone, making the endometrium thickened by long-term estrogen stimulation; ovarian tumors can secrete estrogen, resulting in uterine thickening; perimenopausal women will also cause endometrial thickening due to disorders in ovarian hormones such patients will have long-term irregular menstruation, resulting in a lack of progesterone, making the endometrium stimulated by estrogen for a long time, resulting in continuous thickening of the endometrium; 4, uterine fibroids Uterine fibroids: Uterine fibroids are the proliferation of smooth muscle tissue in the uterus, forming benign tumors, and the uterine wall at the proliferation site will be locally thickened; 5. Uterine body inflammation: Because inflammation also causes local tissue congestion and swelling, in the case of uterine body inflammation, there may be thickening and enlargement of the uterus, which may also be accompanied by abdominal pain, fever, increased leucorrhea and other non-specific manifestations, which need to be combined with gynecological examination to determine the cause; 6. Breast cancer patients need to take tamoxifen for a long time after surgery, which may also cause thickening of the endometrium. In addition, anovulatory infertility and obesity can also cause endometrial thickening in different degrees.