Thanks for your help, though most of that relates to medical treatment. I was rather hoping that someone who deals with rheumatological patients might see it and be able to offer some more specific physio advice. There is info out there, I found this:

www.raynauds.org.uk/potio...herapy.pdf

It's fairly informative and I will give her a copy of it to read, but at present I haven't assessed her so I don't know quite how serious her condition is. I think it's pretty bad, as it seems to be affecting her speech recently, I don't know if it's just her facial muscles, or if her tongue is involved as well. I guess I need to assess her level of function/disability and take it from there - I can't fix her problems, but I can help ease the symptoms.