Endometrial lining of 11mm is due for menstruation, normal endometrial thickness is around 8-12mm and the exact endometrial thickness can be clarified by ultrasound of uterine adnexa. At present, the endometrium is around 11mm, it is considered to be in the secretory phase, and menstruation will come in the next 2-3 days. Before menstruation, keep your abdomen warm and reduce the intake of cold drinks and spicy food. Exercise properly and keep your mood happy to prevent long-term depression or mental stress from leading to adverse consequences such as premenstrual syndrome and irregular periods. During menstruation, you should do a good job of perineal cleansing and hygiene, wash the vulva with warm water 2-3 times a day, and change sanitary napkins diligently, once every 2-4 hours.