Trichomonas vaginalis infection usually causes trichomonas vaginitis, while cervical erosion in most cases is a physiological condition, primarily due to the excessive growth of columnar epithelial cells on the cervix under the action of estrogen, replacing some of the squamous epithelial cells, thus presenting an eroded state of the cervix. Of course, this physiological condition sometimes cannot be easily distinguished visually from pathological changes, such as precancerous lesions of the cervix or cervical cancer. Therefore, when cervical erosion occurs, it is emphasized that cervical cancer screening must be performed, including tests like TCT (ThinPrep Cytology Test) and HPV (Human Papillomavirus) screening.