I got punched pretty hard in my upper arm, the area is swollen, black and blue, and I have what would almost look like welts of this persons knuckles on my arm. It hurts lay on it. Put any kind of pressure on it, it hurts to even actually move my arm. I understand that it would be sore and bruised. But my question is, could anything else be wrong with it?? Or is it just very badly bruised?