The second step is to do colposcopy to check cervical erosion: to observe the changes of cervical epithelium under the action of iodine and vinegar. One or two examinations need the cooperation of doctors. Doctors usually touch the changes of uterus and cervix, which is related to the doctor's experience. If the cervical erosion is serious, the doctor will do TCT again. In the third step, TCT examines cervical erosion, mainly to exclude cervical erosion and canceration, and analyzes cervical secretions from the cellular level to see if there are suspicious malignant lesions. If the result is suspicious, the doctor will enter the fourth step of laboratory examination. The fourth step is to check cervical erosion: biopsy should be taken for pathological examination to diagnose the degree of canceration. The above are the routine methods to check cervical erosion: abnormal leucorrhea and large amount, which all indicate the existence of gynecological diseases. I suggest you go to the hospital as soon as possible to avoid delaying your illness.