The chances of infection after conization of precancerous cervical lesions are not high. Cervical conization is a method of conical excision of cervical lesions by Liparoscopic surgery when pre-cancerous lesions have occurred in the cervix, which needs to be performed 3~7 days after menstruation is cleansed, and through preoperative gynecological examination and leukorrhea test, etc., the surgery is performed under the circumstance of ruling out vaginal inflammatory infections. During the operation, the doctor will thoroughly sterilize the vulva and vagina as well as the cervix, and anti-inflammatory drugs will be given routinely after the operation. After the operation, follow the doctor’s instructions to pay attention to rest, avoid strenuous exercise, exertion, etc. Generally speaking, the chance of infection after the operation is relatively low, but do not rule out the possibility of infection, related to the resistance is low, did not pay attention to the vulva cleanliness and hygiene, premature coitus and so on. It can cause increased secretion, vulvar itching, pain, etc. It is necessary to use drugs to control the infection under the guidance of the doctor. After cervical conization surgery, there will be a small amount of vaginal bleeding, if the vaginal bleeding occurs after two weeks after the surgery, under the exclusion of normal menstruation, it may be related to the bleeding of the wound scab removal, and need to stop the bleeding treatment under the guidance of the doctor. If infection occurs after conization surgery for precancerous cervical lesions, you need to actively go to the hospital and follow the doctor’s instructions for treatment.