The cervical opening is at the uppermost part of the vagina. Usually, when you wash the vulva and the inside of the vagina, you can feel a cylindrical tissue, which is the location of the cervix. There is a hole in the middle of the cervix, which is the cervical os. Usually, the cervical opening is the place where you have to enter through the cervical opening to get an IUD, to get an IUD, or to perform various operations in the uterine cavity. Therefore, the opening of the cervix is generally rounded in most women who have not had children, and in women who have had children, it is generally in the shape of a letter. Generally, if you feel abnormalities in the cervix, you can go to the hospital for cervical cancer screening. If the cervix is not good, it will show up as contact bleeding during intercourse, or blood in the leukorrhea, or bloody discharge in the leukorrhea, all of which indicate the possibility of problems with the cervical os. Therefore, if you know the position of the cervical opening and feel abnormal, you must go to the hospital every year for cervical related examination to see if there is any abnormality in the cervix.