It is common to have joint pain in lupus that does not leave a physical sign of redness or inflammation. It is often said the the amount of pain felt appears out of proportion to the way the joints look - especially when you compare SLE joints to rheumatoid arthritis joints.
It is also common to have redness/warmth/swelling too - it can happen either way with lupus. Hope this helps and your sister can finally get some answers and good treatment soon.
It is also common to have redness/warmth/swelling too - it can happen either way with lupus. Hope this helps and your sister can finally get some answers and good treatment soon.