Do you think he is losing weight mostly because of the mouth sores, or a cumulative of everything?

Are they looking at rare diseases? or combination of diseases?

I am guessing they checked for Lyme & Chronic fatigue syndrome??

I know a rare disease called Pemphigus Vulgaris will cause mouth sores and cause severe weight loss. It is autoimmune , but rare.
Just mentioning it as I knew someone who had it-
info-
http://www.google.com/search?q=Pemph...ient=firefox-a

Have you considered Homeopathic/Naturopathic dr?

If the MDs can't figure it out maybe try an expert in alternative care?


Have any special mouth rinses for the sores been tried??