I have noticed, well I guess in the last month or so, that after I walk a lot, which I do at work, my feet, ankles and calf area become swollen. This doesn t happen all the time, but maybe once a week. I also wear military type boots, and where the top part of the boot touches my inner-calves, on my left leg, a red, looks like blood just under the surface, mark appears and is about 3 inches long and about one inch in width. It s not tender to the touch or painful at all. In fact yesterday I walked in Austin at the green belt, probably over 7 miles and only noticed the swelling and red mark after the walk.