I have bulges that formed on the back of the knee (the side where the leg bends) on the left first and then 2 days later the right. There is now a sensation of constant burning. It is now burning nearish wear my legs meet the groin and I'm feeling the same burning where my arms bend. I had an ultrasound to rule out blood clot, had some tests to see if I had muscle inflamation or infection and bloodwork all seems fine. Had an xray of my knee and that seems fine. Not quite sure what next step should be. I do have a gallbladder which functions at a low rate and chose not to have it removed (mostly from fear of surgery). My doctor didn't think that would have anything to do with my symptoms, but just thought I'd mention it. My feet get a bit swollen so I try to kick my shoes off during the day. My left calf muscle spasms but moreso at night.