My 17 year old son was recently elbowed o the back of his neck in a basketball game. Several days later, he noticed his c7? (Bulky bone at the top of his spine) is swollen. He said it hurts to press on it. No other pain or weakness anywhere else whatsoever. He continues to go to basketball practice and he said the swelling does not bother him unless someone touches or presses on it. We are concerned