The color of the leukorrhea is yellow and watery, and there is a fishy smell, may be bacterial vaginitis. Bacterial vaginitis is mostly caused by mixed infections and is usually treated with metronidazole medication, either orally or intravaginally. Metronidazole can inhibit the growth of anaerobic bacteria without affecting the growth of lactobacillus, is the treatment of bacterial vaginitis is more ideal medication. There are three most common types of vaginitis: bacterial vaginitis, trichomoniasis and mycosis fungoides. The symptoms of these three types of vaginitis are different because the causative organisms are different. The leukorrhea of mycotic vaginitis is usually heavily increased, whitish in color, thicker, and can be tofu scum-like. The changes in the leukorrhea of bacterial vaginitis are thin, slightly yellow in color, and often accompanied by a fishy odor. Through the above description can be seen, may be bacterial vaginitis, it is recommended to use metronidazole medication, but the specific use and dosage is best to consult the local doctor.