Hello, Itching in vagina can occur due to various causes like yeast infection - candida, valvo vaginitis, in menopausal women due to atropic vaginitis by decreased oestrogen level, urethritis, trichomonas infection which is a type of STI, stress related, allergy to certain detergents, ointments, soaps etc, even some precancerous conditions may cause itching. Increased blood sugar level can predispose the body for increased occurance of infection. Avoid use of perfumed toilet tissue, maintain hygiene of whole area, change wet clothing as soon as possible, loose weight if overweight, keep eyes on blood glucose level. Consult a gynaecologist and undergo through few investigation like culture & sensitivity test of vaginal secretion and also of urine, PAP smear test, hormone level assessment. Consult a gynaecologist for further management. Take care , bye.