The main symptoms of endometrial thickening: 1. Irregular menstruation. Long menstrual cycles or a period of amenorrhea followed by heavy vaginal bleeding, which can be prolonged and dripping. 2. Infertility. Endometrial thickening is often caused by non-ovulation, such as in adolescent girls, perimenopausal women, polycystic ovary syndrome, endocrine disorders, and functional tumors. This is because estrogen continues to act on the endometrium for a long time without progesterone to counteract it, and the lack of secretion period transformation will be in a proliferative state for a long time, which will easily lead to infertility. 3. anemia. If there is no timely intervention for prolonged vaginal bleeding, it may trigger anemia symptoms such as headache, dizziness and weakness of limbs. If the endometrial thickening is more obvious, it is recommended to do diagnostic scraping and then send it for pathological examination to clarify whether there are other lesions.