Hi - I have a large red bump on my leg (maybe two inches) almost circular, slightly warm to the touch and hurts slightly when I press it - then on the other leg I have a smaller red bump not warm and barely hurts to touch. Both are on the front of my leg, my shin. I don t recall bumping into anything but it s possible I did as I often do - but I just recently was on a long flight and my shins felt tight after so I m really concerned about blood clots. Do you think what I described is a cause for concern? They look almost like bug bites...