text: knee and leg bruises? i run for exercise on the treadmill 6/7 days a week, and lately my right knee has been hurting me a lot very badly and it had developed some bruises around the ccap area, as well as the middle part of the shin. what do you suppose this could be from? is it something called a "bruised bone"? i know it is not a normal bruise (bloot clot in the area) because i am certain it is from the running that i do. if it is a clot, u must see a doctor asap