The difference between trichomoniasis and mycotic vaginitis lies in the following aspects: 1. The causes of the two diseases are different. Trichomonas vaginalis is caused by Trichomonas vaginalis infection, while mycosis vaginalis is caused by Pseudomonas vaginalis infection. 2. The symptoms are different. The symptoms of trichomoniasis are increased leucorrhea, which is usually yellow foamy leucorrhea with an odor, while the leucorrhea of mycosis is tofu-like, lumpy and white, and the leucorrhea can be accompanied by severe itching. 3. The treatment of the two diseases is different. Trichomonas vaginitis applies drugs such as metronidazole for anaerobic bacteria, while mycotic vaginitis requires the application of drugs such as clotrimazole for mycotic infections.