My son, 10, hit his head and neck into the boards during a hockey game on Saturday. He was evaluated by doctors after it happened and we were told he did not have a concussion . He practiced the past 2 days, and only felt very mild stomach upset but no headache or dizzyness. Today he is complaining of an ear ache. Can this be related? He has also had a bit of a cough, but nothing major, no stuffy nose or sore throat .