What part of the answer is inaccurate?
Every provider has had similar types of patients with itches with no rash. You check them for the obvious (thyroid problems, etc.) and send them to neurology if indicated. If nothing is found, then treating the anxiety is what is left. Since you have already tried all the home remedies, there is nothing else you can do to treat it until her medical professional provides a diagnosis, which will also come with a treatment plan.