Thanks Cyclelops. I know about this from reading posts on this site but my GP refused to acknowledge my GI problems as being autonomic. How is this tested for? I have dry eyes, sweat issues (mostly I don't sweat at all now but randomly I sweat somewhere profusely, have jaw nerve neuralgia issues now, impaired sense of taste and no sense of smell. The neurologist knows all of this and yet he doesn't refer to it at all in his letter describing my SFN as mild. Can it be mild if it's affecting me in so many ways? I realise this is a clinical definition but it still seems bizarre when my arms and legs are so affected - not to mention the rest.