Hi all. I've had various tests ordered by my consultant neurologist as I have neuropathy and 3 autoimmune conditions along with fibro. My mouth was examined and my salivary glands aren't producing enough saliva and I'm having a lip biopsy tomorrow and an US scan on Thursday. I saw an ophthalmologist last Friday about my dry eyes and he diagnosed Blepharitis. I'm quite confused about it all. Any info on reliability of Schirmer test, lip biopsy or US scan gratefully received. Blood tests are normal. Thank you. I'm in the UK.