Diagnosis and treatment of gynecological disorders, many of which require vaginal examination, is performed in women with cyclic menstrual flow. The timing of the consultation should be chosen according to the timing of the menstrual cycle. If the timing of the visit is appropriate, it will not only facilitate the diagnosis of the disease, but also the treatment. Generally, gynecological examination is not performed during menstruation because the opening of the uterus is slightly open during menstruation and the endometrium is invasive, so it is easy to bring bacteria into the examination and cause inflammation of the endometrium, fallopian tubes and other reproductive organs, which can cause long-term back pain and abdominal pain if not handled properly. In addition, the gynecological examination can also squeeze the endometrial fragments shed during menstruation into the myometrial wall, fallopian tubes and even the pelvic cavity, causing endometriosis and gradually aggravating dysmenorrhea. Therefore, the best time for gynecological examination is 3 days after menstrual cleansing. However, if there is persistent irregular vaginal bleeding or sudden heavy bleeding with abdominal pain, syncope, or the appearance of swelling, one should not mechanically wait for menstrual cleansing to avoid delaying the condition. Patients should preferably wash their vulva with water (but not douche the vagina) before the visit, and should avoid sexual intercourse as well as vaginal medication the day before to avoid affecting the results of laboratory tests. Preparation for tubal patency tests, IUD or IUD removal, cervical treatment, hysteroscopy, hysterosalpingography, etc. should be performed 3-7 days after menstruation and intercourse should be prohibited after menstruation until the examination to prevent infection. The most common gynecological examination is pelvic ultrasound, which usually requires holding urine (some can do transvaginal ultrasound, but it is not suitable for patients with menstrual periods or vaginal bleeding, or if the uterus is too large). Do not urinate before going to the doctor, so as not to hold your urine and lose valuable time, or bring a glass of water with you, there are hot water heaters in the hospital.