I have this problem again that my feet are swelling up again, around my ankles and up my legs - I was in hospital a few weeks ago - and found that my kidneys were dehydrated, I am on the fluid retention pill, and I do drink lots of water, I finding it very sore and uncomfortable to walk, I have a blood condition called Polycythaemia Vera, and is unsure wither this problem is related, or related to Fibromyalgia, do anyone have a clue, when I was last in hospital, they tested my heart and that was fine.