subject: What Causes Fishy or Foul Smelling Odor or Discharge Right after Sex? How to Get Rid of Fishy Smell Vaginal Odor? [print this page] You'll notice the first changes start to happen the very first day. Your itching burning and fishy foul smelling vaginal odor will start fading away. Within 3 day your BV will be completely gone and you will feel better and better as your body rebalances itself. You'll be full of vibrant energy and joy. Best of all, you'll be permanently BV free and you'll never have to worry again.