I need to find out what could be the underlying condition for this. 65 year old borderline overweight woman. She is collecting fluid and has edema in the whole body. Lymph massage is reducing edema, but at times when getting up from sitting on a chair she is bending 90 degrees. Her knee bones she says are as if floating and then fusing, so she has to wait in the right angle position for 1-2 mins. Is this related to kidney disease or some other problem. Please kindly advise which specialist will have this domain knowledge.