Vaginal itching is caused by the following reasons: 1, mostly caused by poor hygiene habits: the vaginal opening has a special anatomical structure, with the urethral opening in front and the anus behind, and is in a hot and humid environment, so it is easy to breed bacteria; without good hygiene habits, without daily cleaning, it can cause vaginal inflammatory infections; 2, caused by the spread of sexual life: unclean sex or multiple sexual partners can cause vaginal inflammation; 3, the use of public Allergies: if the sanitary napkin used during menstruation is not suitable or the quality of sanitary napkin is poor, it may cause vaginal inflammation and vaginal itching; 5.