Vaginal itching. It can be prevented?

I'm experiencing severe vaginal itching since a month. Its so severe that I urge to literally scratch the vagina. It's in outer and inner labia both and also on the pubic hair side. I have also seen some tears and inflammation in the vagina especially in the hairy part which is on the top of vagina. Are the tears due to scratching? Have been using surfax cream, but then it gives relief only for sometime then again itching cones back. Then I have tried Himalaya v gel and coconut oil. This provided me relief but if I don't use this the itching comes back. Have been using v wash to clean the vagina. The discharge is normal and not smelly.Please tell the reason why this itching is occurring . How it can be prevented? Pictures attached