If the vagina is infected, the following symptoms will occur clinically: first, increased leucorrhea and yellowish or bloody leucorrhea. If the infection is caused by trichomonas, the main reason is that trichomonas infection causes a large number of bleeding spots on the vaginal mucosa. Secondly, there may be vulvar itching, such as clinical mycobacterial infection, which will not only cause redness, swelling, heat and pain of inflammation, but also localized allergy of vulva, resulting in severe itching of vulva. Thirdly, local pain can occur clinically, as the inflammation leads to local mucosal congestion and edema. These are the clinical symptoms of vaginal infection. Once these symptoms appear, it is necessary to go to the hospital for examination and treatment in time.