question: I have a 6 year old son with a forearm bruise – about 2 inches in diameter with a somewhat raised white bump in the middle. This bump feels like a small hard nodule and can be moved around a little under the skin. He has no fever and does not complain of pain in the area when I push on the bump or the surrounding bruised tissue. Our pediatrician diagnosed simply as a bruise. What is it and how do i treat it?