my son has severe temperature changes in his legs, swelling in his feet &/or knees, within cm of each other there is severe cold and heat, hot with redness & cold with mottling at times, feet mostly with the motlling, swelling and cold, knees mostly with the heat, redness and swelling, the hot and cold areas move from leg to leg and areas of each leg, he is paralyzed due to spina bifida so if there is accompanying pain he is not feeling it, it does cause his BP to elevate though and there is NOTHING wrong with his heart and no circulatory problems they can find