The enlargement of the cervical opening is mainly caused by the following reasons: local inflammation of the cervix. Under the stimulation of long-term chronic inflammation, tissue proliferation occurs, so the volume of the cervix will increase. If there is local congestion, anti-inflammatory treatment can be given. If there is no local congestion and the cervical volume only increases, clinical treatment is not necessary and regular review and cervical cancer screening can be done once a year.