I was diagnosed borderline Sjogren s a few years ago, no major problems other than dry eye , mouth, nose and skin. In this recent heat I have developed swelling in ankles and now some edema in knee , and am thirsty. I also got a case of thrush from dry mouth and am treating with Rx lozenges. Not sure if I also have a UTI as I hav a little urgency, but no burning. I plan to see the MD but in the meantime, I am worried could this be kidney related? I have no other complaints.