What Is The Treatment For Vaginal Rashes?

hi i have these rashes around my vagina. before this ever happened my husband was constantly scratching his balls or any area near his organ and after having several sex. i started to get sore there and then when i had my menstration i started to have this burning itchy sensation on the sides of my vagina and now it has spread. it really is itchy i've tried using vaginal wash. it gave some form of relief but it came back later on. and it is painful and itchy. i don't know what to do pls help me. it's a discomfort when i'm at work...