Sandra, Im sorry but I do not know what can be done about chronic swollen tongue. I wish I had some ideas to help you.
@Jon, the Biotene gel and spray do not contain the helpful ingredients like they did years ago. Unfortunately, Biotene changed its formula and removed the things that helped dry mouth patients. Unbelievable right??!!??! Now, Biotene products are just overpriced mouth rinses and other assorted things. I dont know how they can get away with still promoting their products like they actually have helpful ingredients in them... they dont! After years of searching for something that is a good replacement that will really help dry mouth sufferers replacement products are finally just emerging. Brian just put up a post about the new products, the link is below along with the original Biotene has changed link.
New Dry Mouth ProductsBiotene Changed its Formula thread