Since cervical cancer has a long precancerous stage, cervical cytology examination can achieve early diagnosis and treatment of cervical cancer, so women are reminded to have regular gynecological checkups! Cervical cancer belongs to the first gynecological malignant tumor in female reproductive system in terms of incidence. I. Etiology HPV infection is a necessary factor for cervical cancer to occur, HPV negative almost will not occur Cervical cancer Prevalence factors: 1. premature sex; 2. sexual disorders; 3. sexually transmitted diseases, HPV infection; 4. low economic status; 5. oral contraceptives, etc. The most effective preventive measure is probably to give preventive vaccination before the start of sexual life; 2, the cost of the vaccine project is high; 3, HPV vaccine may have a protective effect but it takes 20-30 years to see the results. Secondary prevention Regular screening: Pap smear (traditional cytology); TCT (liquid-based cytology); (colposcopy) HTV test; screening and good tissue management are still necessary at least for women who are not vaccinated and are at an age when they are vulnerable to cervical cancer. Clinical manifestations Early asymptomatic: need to be detected by screening; once symptoms appear: vaginal bleeding contact bleeding bleeding bleeding from the same bed blood from gynecological examination; menstrual changes: heavy periods long periods shortened cycles postmenopausal bleeding in old age; vaginal drainage etc.