The precautions after HPV vaccination are as follows: First, patients should be observed in the unit of vaccination within 0.5-1 hours after vaccination, some individual patients may develop allergies after vaccination, which can seriously endanger the lives of patients, and many patients may also develop pain or ulcers at the vaccination site after vaccination, which need to be dealt with according to the situation. Secondly, after HPV vaccination, patients also need to be regularly screened for HPV, because the HPV vaccine contains only a few high-risk types of vaccines, there is no preventive effect for other HPV viruses, so patients even if vaccinated with HPV vaccine, but also need to be observed recently, whether there are other types of HPV virus infection, if there is infection will need to be further processed. Third, the HPV vaccine requires three injections, and in the absence of these three injections, the patient should try not to get pregnant. If there is an unexpected pregnancy, there is no need to have an abortion, but the HPV vaccine needs to be stopped and the patient should be given the remaining vaccine after giving birth.