If a woman is infected with trichomonas resulting in trichomonas vaginitis, the main way of transmission is through sexual contact, so it is possible that the sexual partner infected, but some indirect ways can also be infected, such as bathing in a public bath, the patient puts the clothes where he or she then puts his or her own underwear, underwear may be infected. In addition, the place where the patient has done it, he/she will do it right away, which may also lead to infection. The main channel of infection is through sexual contact, and other indirect contact can also lead to transmission. Once infected with trichomonas, it is recommended to actively give treatment, and not to have intercourse before the laboratory test has not turned negative, there is a possibility that the infection will be transmitted to the sexual partner and lead to cross-infection, which will bring certain difficulties in treatment.