I'm not her but I often think that if you have other symptoms like dry mouth or aches they can make connections or also identify the why behind this. I know through my trying to find out what caused all my problems they kept saying if they could find that it will help because you can treat that and the pain and overall is a lot better. Like for ex people who have low b12 they they treat that and it assists in everything. Sorry if I am off base. On a side note I have skin changes,aches,and dry mouth and have had every auto immune etc test repeat and don't have it so it is not always