Itchy vagina could be a result of yeast infection, bacterial infection or sexually transmitted disease. Depending on other symptoms accompanied with the itching. Kindly use the search bar to find questions and answers on infections for better understanding.
Depending on the type of infection you have, treatment are carried out after you must have seen a doctor for diagnosis and therapy involves using either antifungal, antibacterial or antiviral drugs.
Kindly see a gynaecologist for help.