Endometrial thickness of 1.5cm is mainly due to the thickening of the endometrium before the onset of menstruation, endometrial polyps, hormonal imbalance in the body and other reasons for the formation of the endometrium. 1. When the endometrium reaches 1.5cm before the onset of menstruation, the endometrium usually returns to normal after the onset of menstruation and after menstruation is cleared. This is normal and does not require treatment. 2. Endometrial polyp refers to the growth of polyps and other foreign bodies on the endometrium, which can also cause the symptoms of endometrial thickening, most of the menstrual period after the clean-up will also have obvious thickening or prolonged irregular bleeding, this usually requires hysteroscopic surgery to remove the polyp can be restored. 3. Hormonal imbalance in the body refers to high estrogen and relatively low progesterone, and the endometrium can’t shed normally during the menstrual period, resulting in symptoms of endometrial thickening. Oral medication can be prescribed to regulate, such as progesterone, but not self-medication to avoid adverse effects. The endometrial thickening of 1.5cm may also be due to other reasons, we need to consult the doctor in time to check the cause of the disease, find out the cause of the disease and then symptomatic treatment and treatment, to avoid delaying the condition.