My 13 year old son fell backwards today at school and hit the back of his head on the concrete (8 hours ago). He has quite a bruise and a big lump but he said that he wasn t unconsious. He felt a bit dizzy shortly afterward and had a headache the most of the day. The school put ice on the lump and he had a lie down for an hour or so. He then felt well enough again to rejoin his class. We were having dinner and suddenly his nose started bleeding. It didn t last long (About 5 mins) but was quite severe while it lasted. He does get the occasional nose bleed (2-3 per year). He claims he is feeling fine apart from a numb sort of feeling where his head hit the concrete and a bit of a headache. His pupils react when I shine a light towards his eyes and he has no double vision or pain/ stiffness in his neck or nausia. Do I need to be concerned about the nose bleed and or concussion? Thanks!!