Postmenopausal endometrial thickness of 11mm belongs to the endometrial thickening, usually caused by endometrial lesions, whether it is serious depends on whether it is benign lesions or malignant lesions, it is recommended to do hysteroscopy. A postmenopausal endometrial thickness of 11mm is not normal, and after menopause the endometrial thickness is usually less than 4mm. endometrial thickening is usually caused by endometrial pathology, and benign pathology is not serious, such as endometrial simple hyperplasia, endometrial polyps, atypical hyperplasia of the endometrium, etc. If the malignant pathology is more serious, the endometrial thickness is usually less than 4mm, and the endometrial thickness is usually less than 4mm. Malignant lesions are more serious, such as endometrial cancer and uterine sarcoma. If endometrial thickening occurs after menopause, it is necessary to go to the hospital in time for hormone level examination, hysteroscopy, segmental diagnostic scraping, etc., to determine whether there is endometrial pathology.