About a week and a half ago I had a box break, allowing the 50lb metal bar in it to hit my calf. It cut the skin, hurt to walk on for two days, and I had a really bad bruise come up. The bruise faded, however I have a large knot in the middle that the bruise is coming back around, more everyday. It is also red around the knot, very very sore, and itches. Any need for concern?