Health Professional
I suggest that you ask your GP to refer you to to a specialist rheumatologist for more detailed investigations.
Your elevated "RH factor" (I guess by this you mean rheumatoid factor) could indicate rheumatoid arthritis (your joint pain fits with this) as well as Sjögren's syndrome (your dry eyes fit with this). Elevated rheumatoid factor can also be associated with other autoimmune diseases like systemic lupus erythematosus.
A specialist rheumatologist will be able to check out these and other possibilities with you and then, depending, discuss treatment options with you.
All the best.
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