The endometrium is 14mm thick and has been bleeding for 13 days. Consider endometrial hyperplasia, uterine fibroids, endometrial cancer, etc., which can be treated with medication or surgery as prescribed by the doctor. 1. Endometrial hyperplasia: If there is a lot of vaginal bleeding, diagnostic curettage should be performed immediately to stop bleeding and diagnose the disease. If the endometrial hyperplasia is not accompanied by atypical endometrial hyperplasia, it can be treated with progesterone acetate, dydrogesterone and other progestins as prescribed by doctors; if it is atypical endometrial hyperplasia, it is feasible to have total hysterectomy and other surgical treatments, and it can also be treated with the above mentioned progesterone drugs. 2. Uterine fibroids: If it is clear that the fibroids are caused by uterine fibroids, patients can follow the doctor’s instructions to use gonadotropin-releasing hormone analogues, mifepristone and other drugs to reduce the volume of fibroids, but also available tranexamic acid and other antiemetic drugs, iron supplements to correct anemia. For those who have unsatisfactory effect of drug treatment, surgical treatment such as myomectomy and hysterectomy can also be performed. 3. Endometrial cancer: Those who have clear endometrial cancer need to cooperate with doctors to remove the lesion through surgery, and after surgery, they can also combine with radiotherapy, chemotherapy and new type of targeted therapy, etc. The commonly used chemotherapy drugs include carboplatin, paclitaxel, letrozole, etc. It is recommended that people with endometrial thickness of 14mm who have been bleeding for more than 13 days should go to the doctor for examination, and cooperate with the doctor for treatment after clarifying the cause of the disease.