What does it mean when there is a yellow discharge from the vagina and itching on the outer area there is no odor it doesn't always have yellow discharge when I go to the bathroom it just itches and has yellow discharge sometimes

Your . Your symptoms could be any one of a number of things including a yeast infection, bacterial vaginosis, trichamonas, or some other infection or it could be something more rare such as a dermatitis. It could also be normal discharge though the yellow color and itching are more concerning. You need a complete gyne exam with cultures and examination of your vaginal fluid. By doing all of this, hopefully your doctor will figure out what is causing your symptoms and be able to treat you appropriately. Good luck!