Irregular vaginal bleeding, increased vaginal discharge, frequent urination, urinary urgency, painful urination, bleeding after sexual intercourse, cervical erosion, contact bleeding, mixed leukorrhea Patients with precancerous cervical lesions usually do not show obvious symptoms, or only have general cervicitis symptoms, such as increased leukorrhea. There are also complaints of leukorrhea with blood or small amount of vaginal bleeding after sexual contact. Severe intraepithelial neoplasia of the cervix is a precancerous lesion, which is reversible, i.e., a part of the lesion can disappear naturally, but it is also progressive, i.e., the lesion can develop and even become cancerous. Its reversibility and progression are related to the scope and degree of the lesion. Mild intraepithelial neoplasia is significantly more likely to disappear naturally than moderate or severe. The possibility of severe intraepithelial neoplasia developing into cancer is significantly greater than that of mild and moderate. Some scholars believe that mild intraepithelial neoplasia of the cervix is a benign abnormality that can naturally turn into normal.