Contact bleeding after intercourse can be considered as cervical inflammation, cervical intraepithelial neoplasia (CIN), cervical cancer, etc. Cervical intraepithelial neoplasia can be classified as grade I-III, of which high-grade CIN is precancerous, the onset of which is mainly closely related to persistent high-risk HPV infection, and the transformation zone is a good site for CIN and cervical cancer. CINI grade can be observed temporarily, while CINII-CINIII need LEEP knife treatment or conical hysterectomy. Cervical cancer treatment surgery is required if the results suggest cervical cancer.