Trichomonas vaginitis is caused by an infection of Trichomonas vaginalis in the vagina. Without treatment, it is usually difficult to heal on its own. Furthermore, Trichomonas vaginalis in vaginal trichomoniasis can not only occur in the vagina but can also cause infections in the urinary system and enter into the urethra. Therefore, when diagnosing trichomonas vaginitis, it is generally advised not to use local treatment, i.e., not to administer medication solely into the vagina, but to recommend systemic treatment, generally recommending oral administration. This is because if only vaginal medication is administered, it might initially clear the trichomonas vaginalis in the vagina, but since the urinary system may still harbor Trichomonas vaginalis, it could lead to a recurrence of trichomonas vaginitis.