Trichomonas infection is mainly transmitted clinically through sexual contact. Indirect transmission can also lead to trichomonas infection, such as bathing in a public bath may be infected, or doing sauna in a public place, and the infection can be transmitted between clothes, so it is best to protect yourself. If you go to do a sauna or take a bath in a public bath, put your clothes in a plastic bag prepared in advance to avoid the possibility of cross-infection. In addition, trichomonas infection can cause a large amount of foamy vaginal discharge and itching of the vulva. It is recommended to rinse the vaginal discharge with 1:5000 potassium permanganate and insert metronidazole for one week or until the clinical symptoms disappear.