bb, Welcome to the site. I had mouth sores too, the best thing i found for them, i got at a health store, it is called " DGL "(Deglycyrrhizinated Licorice Root Extract) I swear by this stuff, like others i tried the prescription stuff and it didnt help, i dissolved one of these tablets in water and put it on the mouth sores at least 4 times a day, and within a couple of days they were gone, but by the next day, i would have relief and some would be gone already, try to catch them early if possible. I also agree with Wayne, if you have already lost your taste and appetite, ask your doctor about a stomach tube, dont wait to long, keep swallowing though, its very important!!! Hang in there, and remember, we are here for you. Think positive, it will be over before you know it!!!