A very hard cervix may be caused by chronic cervicitis, cervical smooth muscle tumor, cervical malignant tumor and other diseases. 1. Chronic cervicitis: this is a kind of chronic inflammatory disease caused by pathogens infecting the cervix. Under the continuous stimulation and action of chronic inflammation, the glands and tissues in the cervix will undergo proliferative changes, which will lead to cervical enlargement and become very hard. 2. Cervical smooth muscle tumor: this is a special type of uterine fibroids, which can grow in the anterior and posterior lips of the cervix and the lateral side of the cervix. Due to the hard texture of smooth muscle tumors relative to normal cervical tissues, when smooth muscle tumors appear in the cervix, it can lead to hard cervical area. 3. Malignant tumor of the cervix: mostly seen in endogenous cervical cancer, due to the continuous invasion and growth of cancerous tissues and cells in the cervix, the patient’s cervix can be enlarged and become hard in texture. In addition to the above reasons, there are many other possible causes of cervical stiffness, patients should consult a doctor in time to clarify the cause of the disease, and carry out individualized treatment under the guidance of a professional doctor.