Dark area in the cervix may be cervical natriuretic cyst, inflammation, pregnancy, tumor and other conditions, which need to be analyzed specifically. 1. Cervical natriuretic cysts: cysts formed when the glandular ducts of cervical glands are blocked, resulting in the inability to discharge cystic fluid, which is manifested as a liquid dark area under ultrasound. 2. Inflammation: If there is inflammation in the cervix, the inflammation will usually have exudate, which will cause the cervix to show a dark area when the examination is performed. 3. Pregnancy: If pregnancy occurs in the cervix, it may show up as a dark area on examination due to the presence of a gestational sac. 4. Tumor: If a tumor exists in the cervix, it is prone to hemorrhage and necrosis, resulting in a dark area on imaging. If there is a dark area in the cervix, it is recommended to go to the hospital in time, to clarify whether there is a pathological factor, and take reasonable methods of treatment under the guidance of the doctor, so as to promote the alleviation of the condition.