For example, in the case of low grade precancerous lesions of the cervix, laser treatment can be used to char the lesions and grow new tissues, thus achieving a cure. If the cervical precancerous lesion is a high-grade precancerous lesion, then laser is not effective and cold knife conization of the cervix is needed to cut off the lesion. Because high-grade precancerous lesion means that the accumulated cervical epithelium is deeper, so conical excision of the cervix is needed and then sent to pathology for laboratory test, and the final clinical diagnosis is based on pathology. In addition, if the edges have been cut cleanly, it is recommended that a review be done 3 months, 6 months, and 1 year after surgery, and if there is a high-risk HPV infection, colposcopy is recommended to rule out the possibility of lesions.