Under normal circumstances, women's vaginas themselves are connected with the outside world. In addition, women's vaginal resistance declines after pregnancy. These two factors work together to make women prone to vaginitis during pregnancy. If abnormal leucorrhea occurs during pregnancy, accompanied by itching and odor, this situation indicates that there is a great possibility of vaginitis. During pregnancy, vaginitis must be treated. If not treated, premature rupture of membranes or intrauterine infection may occur. What drugs pregnant women use for vaginitis mainly depends on the type of vaginitis. First of all, we should test the leucorrhea routine to determine what type of vaginitis is. Common types of vaginitis include trichomonal vaginitis, fungal vaginitis and bacterial vaginitis. If it is trichomonal vaginitis, metronidazole or nifurtel can be selected for treatment. If it is bacterial vaginitis, metronidazole is generally recommended for treatment. If it is fungal vaginitis, clotrimazole or nifurtel is generally recommended for treatment. These drugs are safe during pregnancy.