Otitis media surgery is a delicate and minimally invasive procedure. As patients who know their own physical condition best, the important information you must tell your doctor after hospitalization are: 1. History of previous ear surgeries, confirming the time of the ear surgery and the name of the surgery, and making sure to copy the hearing data before and after the previous surgery, the surgical records and the course of the disease. 2. History of surgery on other parts of the body, including the time of surgery, name of surgery, and any history of anesthetic allergies. 3. History of drug and food allergies, including: the names of allergic drugs and foods, the time of occurrence of allergy and the rescue treatment. 4. History of various medications for chronic diseases, especially long-term anticoagulant medications (such as aspirin, etc.), which need to be stopped for one week before surgery under the guidance of the doctor. 5.History of various previous diseases (such as diabetes, hypertension, chronic nephritis, chronic hepatitis, sericosis, asthma, hemophilia, hyperthyroidism, organ transplantation, malignant tumor, etc.), including the name and dosage of the drugs being taken now 6.Whether there is a tendency to bleeding (excessive menstrual flow, broken skin of wounds or nosebleeds that are difficult to stop and whether the skin is usually prone to bruising, etc.) 7. History of menstruation, with special attention to the fact that surgery cannot be performed during the 7-8 day period from 3 days before to the 5th day of the menstrual period.