If there is vaginal inflammation in the case of coitus, there will be the following hazards: first, inflammation of the vaginal mucosa, the friction of sex may lead to mucosal rupture, resulting in local bleeding. Pathogenic bacteria may further infect the bleeding wound and aggravate the inflammation of the vagina. Secondly, if you have vaginal inflammation, it will cause cross-infection, such as Candida vaginitis, trichomonas vaginitis, if you have sex, bacteria will be infected to the male partner, so that the sexual partner leads to inflammation of the glans, or circumcision, or urethral inflammation, the male infected with inflammation, and then when you have sex with the female, and then the bacteria will be brought to the vagina of the female, so that the inflammation of the vagina is recurrent, and is not easy to be cured.