It is recommended that women should have a cervical examination at least once a year after having sex, because the cervix is easily stimulated by sex for a long time, as well as by menstruation, in addition to vaginal secretions and inflammation of the vagina, which can stimulate the cervix. Generally, if a routine cervical examination is done, it is recommended that it should be done 3-5 days after menstruation, and a routine leucorrhoea should be done along with the cervical examination. The cervical examination usually includes colposcopy, cytology of the cervix, HPV measurement, etc. In special cases, a cervical biopsy may also be performed. Cervical examinations are also needed when a woman has abnormal vaginal bleeding, as abnormal bleeding is usually a precursor to cervical lesions, and a detailed examination is needed to understand the specific situation.