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Vaginal itching could be a symptom suggestive of possibility of infection or dryness. Look out for development of other symptoms like foul smell, altered consistency and appearance of vaginal discharge, presence of burning or rashes, discomfort/pain etc. Visit your doctor/gynecologist for vaginal swab/smear test to look for causative agent. Get started on treatment as indicated. If infective cause is detected (and if you are sexually active) get your partner also treated simultaneously to prevent chances of re-infection. Avoid vaginal douching, use of harsh soap or perfumes in the area. Use loose cotton undergarments and avoid tight fitting clothes. Drink plenty of water.
Take care.