I suffer from a condition called H.I.T. hepparin induced thrombocytopenia. I wear pressure stockings to prevent my legs from swelling, and to prevent a bluish-black discoloration of my feet. Recently, the last month or so, the balls of both feet swell at night causing alot of discomfort due to my frequent trips to urinate at night. A short time after I wake up and move around the swelling and the discomfort stops. The same situation occurs every night to both feet, at first I thought it was cramps in the balls of my feet, because I frequently get cramps in my calves, again mostly at night.