Since Monday, I have had sharp pain on the top of my left foot . There is a knot of some sort and some swelling . The most pain is on the high part of your foot, *top side,with the knot off to the side a little, pain radiates down towards toes. I stand on my feet all day. I don t remember doing anything to it to make it hurt. I can t even sleep that is how much it hurts. I am 38, overweight , about 5ft 3in.