Endometrial hyperplasia without cellular atypia refers to simple endometrial hyperplasia, which occurs in perimenopausal women and is a benign condition. Simple endometrial hyperplasia is an overgrowth of the uterine lining, which is usually triggered by the continuous stimulation of estrogen, and it occurs in perimenopausal women. It is a benign disease, but there is a chance of malignant changes. Therefore, this disease needs to be actively treated, usually with medication such as progesterone or surgical removal of the uterus as prescribed by the doctor. When you find endometrial simple hyperplasia, you need to consult a doctor in time, complete the relevant examinations, and take reasonable methods of intervention under the guidance of the doctor, avoid unauthorized use of medication to prevent the adverse consequences.