Suggest Remedy For Dry, Itchy Vaginal Opening

Hi..Im 25+ yrs old..from past one month or so..iam having lot of itching at my vaginal opening..it stops after some time..i mean ..after my periods ..the itching is there..unbareble..but after 2 weeks or so..its gets fine..

and more over my vaginal area becomes dry as well...

I am using a feminine wash regularly.then too having this problem.plz guide

Wanted to know how to proceed further.