Cervical screening is usually performed in outpatient clinics or medical checkup centers and consists of: 1) cervical smear, which involves wiping away vaginal secretions after exposure, rotating a smear along the cervical canal, smearing it onto a glass slide, and then sending it to the pathology department for examination; 2) liquid-based cytology, which generally involves putting a brush-like brush into the cervical canal and rotating it a few times before putting the cells into the liquid-based cytology fluid for washing The cells are then washed in the liquid-based cytology fluid, precipitated and then stained, and then examined. The best time for cervical screening is 2-3 days after menstruation, and do not have a history of sexual intercourse or vaginal irrigation or vaginal medication three days before doing so to ensure accurate sampling. Do not use paraffin-based lubricants before taking scrapings or liquid-based cytology to avoid interference with the smear, and it is best to wipe the cervical surface clean of secretions when doing so. If there is acute vaginal inflammation, it is better to wait until the acute vaginal inflammation is relieved and stop the medication for 3-4 days before doing the corresponding test, which will be more accurate.