I ve HAD THREE OPEN HEART SURGERIES, THE FIRST BEING AORTIC VALVE REPLACEMENT DUR TO CONGENITAL HEART DEFECTS AND HAVE BEEN ON COUMADIN SINCE 1990. NOW I HAVE SEVERE EDEMA, LEGS, ANKLES, FEET AND TOES AND I DO HAVE CYST IN KIDNEYS AND LATELY MY LEFT SIDE & BACK HAVE BEEN HURTING, COULD THIS BE MY KIDNEYS CAUSING EDEMA, DR RULED OUT CHF WHICH I M ALSO IN, BUT NOTHING HAS BEEN EXAMINED FOR MY SIDE/BACK PAIN. AM ON FUROSEMIDE 40MG DAILEY
Hello the back pain could be due to numerous causes and needs evaluation.  Since you have other comorbidities, and complain of back pain along with the left side, you need to get a X-ray done or better MRI of lumbosacral spine. This would rule out any disc prolapse or spondylolisthesis. Hope this helps. Take care.