I have a large bruise on my left calf right below the knee, towards the outside of my leg. It s keeps recurring in the same spot. I don t recall of any type of injury in that location. It s not always tender, at first I didnt even notice it. It gets about 4in around, and very dark in color. I m a work at a restaurant so I m always on my feet, and a mother of 2 kids. So I m on my feet around 80hrs a week just at work, I m getting worried it might be something wrong..any suggestions?