Gynecological examinations should not be performed during menstruation. During menstruation, the cervix is open and gynecological examinations can easily cause bacterial or viral infections that can lead to endometritis. In addition, the resistance of women is relatively low during menstruation, which increases the chance of infection. Routine gynecological examinations are recommended to be performed within 3-7 days after the end of menstruation. During the 3-7 days after menstruation, the estrogen level is relatively low and the endometrium is thin, which is good for the diagnosis and identification of diseases. In case of menstrual disorders and persistent vaginal bleeding, gynecological examination can be performed during bleeding in order to diagnose the disease. During gynecological examinations for bleeding, it is necessary to take anti-infective medication before and after the examination to prevent the occurrence of infection after the examination.