A small amount of bleeding may occur when the brush is used on the cervix. Generally, the vaginal bleeding may resolve on its own after 1~2 days, but the exact duration cannot be determined due to individual differences. When screening for cervical cancer, in order to detect viruses or tissue lesions, the brush needs to be rotated deep into the cervical canal to ensure the sampling volume, and some patients may experience a small amount of vaginal bleeding, which usually lasts for 1~2 days and then stops on its own. If the patient is combined with cervicitis, cervical polyps, due to the cervix local tissue vascular permeability increase or local combination of polypoids, the patient bleeding time will be prolonged, but the amount of bleeding is generally not more than the amount of menstruation. For the cervix after the use of brush examination of vaginal bleeding patients, if the bleeding continues for more than three days and the amount of no significant decrease or even gradually increase, it is recommended that the patient to the regular hospital gynecology consultation, clear cause of the cause of the disease under the guidance of the doctor active treatment.