When you have your period, you can have a medical examination. However, there are some items that cannot be done, as follows: First, the laboratory test of the white belt, because there is bleeding in the vagina at this time, there is no way to get the vaginal secretion, so there is no way to perform the laboratory test of the white belt. Vaginal ultrasound cannot be done when you are menstruating because there is bleeding in the uterus at this time, so if you do vaginal ultrasound, it may cause infection in the uterine cavity and cause endometritis and tubitis, so it cannot be done. Third, monitoring of cervical exfoliated cells, such as TCT and HPV, cannot be done when you are having your period. Because there is no way to get the exfoliated cells of the cervical canal with bleeding, so it cannot be examined either. Fourth, if the amount of bleeding is relatively large, urine routine cannot be examined either. This is because when receiving urine, blood may enter the urine and cause inaccurate laboratory tests. Except for these these tests mentioned above, all other tests can be performed and will not be affected.