Question
Recently when playing football I went up for a header and got a knee in the small of my back, then a week later I got barged into some barriers also playing football injuring my back. It has been sore for 2 weeks now and when I jump, kick a football or sprint I get a sharp pain near my tailbone. Do you know why this is???

Answer
The 'why is this hurting' part is easy - you've had trauma to the area.  It's the 'what happened as a result' part that's difficult to tell.  It could be any number of things ranging from a broken bone to torn muscles.  I recommend that you see your physician if the pain continues or gets more severe.

Thank you for your question, Christian.  I hope that my answer was helpful.