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Vaginal itching could be a symptom suggestive of possibility of infection or dryness.You require a vaginal swab test to rule out the cause so that treatment can be started soon.Consider visiting a Gynaecologist for evaluation.Till then you can apply Clotrimazole ointment daily for 5 days during night and Calamine for itching in morning.
Avoid douching,bubble baths,tampoon use,sprays etc.
Take care!