Hi dear ,
There are no. of causes of vaginal itching
You need to be examined and treated for the vaginal diseases.
Some test like woods lamp examination,wet mount,KOH preparation may have to be performed.
Visit your nearest dermatologist
for early diagnosis n treatment.
Meanwhile maintain hygiene . Use soft cotton underclothes.
Dont apply savlon or dettol there.
Use normal soap for wash.
You can use ABZORB powder twice a day for application .